{"id":66818,"date":"2026-10-15T11:47:06","date_gmt":"2026-10-15T06:17:06","guid":{"rendered":"https:\/\/www.quickonlinetips.com\/archives\/?page_id=66818"},"modified":"2026-10-15T11:47:36","modified_gmt":"2026-10-15T06:17:36","slug":"number-guessing-game","status":"publish","type":"page","link":"https:\/\/www.quickonlinetips.com\/archives\/games\/number-guessing-game\/","title":{"rendered":"Number Guessing Game: Higher or Lower?"},"content":{"rendered":"<p>Play the classic <strong>number guessing game<\/strong>. I pick a secret number from 1 to 100, and you try to find it. After every guess you are told whether to go higher or lower. Can you get it in seven tries or fewer? 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.qt-sel{background:#BEE3F8;border-color:#3182CE} .qt-tool .qt-bad{background:#FED7D7;border-color:#E53E3E} .qt-tool select{-webkit-appearance:none;-moz-appearance:none;appearance:none;padding-right:40px;cursor:pointer;border:2px solid #90B4DA;font-weight:600;background-color:#fff;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' viewBox='0 0 14 9'%3E%3Cpath d='M1.5 1.5l5.5 5.5 5.5-5.5' fill='none' stroke='%232B6CB0' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 14px center;background-size:14px 9px} .qt-tool select:hover{border-color:var(--qt-accent);background-color:#F4F8FD} .qt-tool select::-ms-expand{display:none} .qt-next{margin:0 0 1.75em} .qt-next .qt-next-h{font-size:14px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:#4A5568;margin:0 0 8px} .qt-next-g{display:grid;grid-template-columns:repeat(3,1fr);gap:8px} .qt-next-g a{display:flex;align-items:center;min-height:46px;padding:9px 12px;border:1px solid #AEC3DB;border-radius:8px;background:#F4F8FD;color:#215387;font-weight:600;font-size:15px;line-height:1.3;text-decoration:none} .qt-next-g a:hover,.qt-next-g a:focus{background:#E3EEFF;border-color:#2B6CB0;text-decoration:none} @media (max-width:600px){.qt-next-g{grid-template-columns:repeat(2,1fr)}}<\/style>\n<div class=\"qt-tool\" id=\"qt-ng\">\n<div class=\"qt-grid\">\n<div class=\"qt-field\"><label for=\"qt-ng-who\">Who guesses<\/label><select id=\"qt-ng-who\"><option value=\"you\" selected>You guess my number<\/option><option value=\"cpu\">Computer guesses yours<\/option><\/select><\/div>\n<div class=\"qt-field\"><label for=\"qt-ng-max\">Range<\/label><select id=\"qt-ng-max\"><option value=\"10\">1 to 10 (kids)<\/option><option value=\"100\" selected>1 to 100<\/option><option value=\"1000\">1 to 1,000<\/option><\/select><\/div>\n<\/div>\n<div id=\"qt-ng-you\">\n<div class=\"qt-stats\">\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ng-tries\">0<\/span><span class=\"qt-lab\">Tries<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ng-range\">1 \u2013 100<\/span><span class=\"qt-lab\">Still possible<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ng-perfect\">7<\/span><span class=\"qt-lab\">Perfect play<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ng-best\">\u2013<\/span><span class=\"qt-lab\">Best<\/span><\/div>\n<\/div>\n<div style=\"height:10px;background:rgba(255,255,255,.5);border-radius:6px;margin:8px 0;overflow:hidden\">\n<div id=\"qt-ng-bar\" style=\"height:10px;background:#3182CE;border-radius:6px;width:100%;transition:all .3s\"><\/div>\n<\/div>\n<div class=\"qt-result qt-roman\" id=\"qt-ng-msg\" aria-live=\"polite\" style=\"min-height:0;font-size:19px\"><\/div>\n<form id=\"qt-ng-form\" class=\"qt-row\" style=\"justify-content:center\"><input type=\"number\" inputmode=\"numeric\" id=\"qt-ng-in\" min=\"1\" aria-label=\"Your guess\" placeholder=\"Your guess\" style=\"max-width:160px;font-size:22px;font-weight:700;text-align:center\"><button type=\"submit\" class=\"qt-btn\">Guess<\/button><button type=\"button\" class=\"qt-btn qt-btn-ghost\" id=\"qt-ng-new\">New number<\/button><\/form>\n<div id=\"qt-ng-hist\" style=\"display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:10px\"><\/div>\n<\/div>\n<div id=\"qt-ng-cpu\" style=\"display:none\">\n<p class=\"qt-sub\" id=\"qt-ng-cmsg\" style=\"text-align:center\">\n<div class=\"qt-result qt-roman\" id=\"qt-ng-cq\" aria-live=\"polite\" style=\"min-height:0;font-size:22px\"><\/div>\n<div class=\"qt-row\" style=\"justify-content:center\"><button type=\"button\" class=\"qt-btn\" id=\"qt-ng-hi\">Higher \u2191<\/button><button type=\"button\" class=\"qt-btn\" id=\"qt-ng-lo\">Lower \u2193<\/button><button type=\"button\" class=\"qt-btn qt-btn-big\" id=\"qt-ng-yes\">Yes, that is it!<\/button><\/div>\n<div class=\"qt-row\" style=\"justify-content:center\"><button type=\"button\" class=\"qt-btn qt-btn-ghost\" id=\"qt-ng-restart\">Restart<\/button><\/div>\n<\/div>\n<\/div>\n<p><script>(function () { function qtReady(fn) { if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', fn); } else { fn(); } } function qtCopy(text, statusEl, okMsg) { function done(ok) { if (statusEl) { statusEl.textContent = ok ? (okMsg || 'Copied to clipboard.') : 'Press Ctrl+C (or Cmd+C) to copy.'; } } function fallback() { var ta = document.createElement('textarea'); ta.value = text; ta.setAttribute('readonly', ''); ta.style.position = 'fixed'; ta.style.top = '-1000px'; document.body.appendChild(ta); ta.select(); var ok = false; try { ok = document.execCommand('copy'); } catch (e) { ok = false; } document.body.removeChild(ta); done(ok); } if (navigator.clipboard) { if (window.isSecureContext) { navigator.clipboard.writeText(text).then(function () { done(true); }, fallback); return; } } fallback(); } function qtRand32() { var c = window.crypto || window.msCrypto; if (c) { if (c.getRandomValues) { var a = new Uint32Array(1); c.getRandomValues(a); return a[0]; } } return Math.floor(Math.random() * 4294967296); } function qtRandInt(range) { if (range === 4294967296) { return qtRand32(); } var limit = Math.floor(4294967296 \/ range) * range; var x = qtRand32(); while (x >= limit) { x = qtRand32(); } return x % range; }  qtReady(function () { var box = document.getElementById('qt-ng'); if (!box) { return; } function $(x) { return document.getElementById('qt-ng-' + x); } var max, secret, tries, lo, hi, done, hist, best = {}, cg = null; try { best = JSON.parse(localStorage.getItem('qt-ng-best') || '{}'); } catch (e) { best = {}; } function paint() { $('tries').textContent = tries; $('range').textContent = lo + ' \u2013 ' + hi; var b = best[max]; $('best').textContent = b ? b : '\u2013'; $('bar').style.marginLeft = ((lo - 1) \/ max * 100) + '%'; $('bar').style.width = Math.max(1, (hi - lo + 1) \/ max * 100) + '%'; } function newGame() { max = +$('max').value; secret = 1 + qtRandInt(max); tries = 0; lo = 1; hi = max; done = false; hist = []; $('in').max = max; $('in').value = ''; $('hist').textContent = ''; $('msg').textContent = 'I am thinking of a number from 1 to ' + max + '. Can you guess it?'; $('perfect').textContent = Math.ceil(Math.log2(max + 1)); $('you').style.display = ''; $('cpu').style.display = 'none'; paint(); $('in').focus(); } function guess() { if (done) { return; } var g = Math.floor(+$('in').value); if (!g) { return; } if (1 > g) { $('msg').textContent = 'Pick a number from 1 to ' + max + '.'; return; } if (g > max) { $('msg').textContent = 'Pick a number from 1 to ' + max + '.'; return; } tries++; var s = document.createElement('span'); s.textContent = g + (g === secret ? ' \u2713' : (g > secret ? ' \u2193' : ' \u2191')); s.style.cssText = 'padding:4px 10px;border-radius:999px;font-weight:700;background:' + (g === secret ? '#C6F6D5' : (g > secret ? '#FED7D7' : '#BEE3F8')); $('hist').appendChild(s); if (g === secret) { done = true; var b = best[max], rec = false; if (!b) { rec = true; } else if (b > tries) { rec = true; } if (rec) { best[max] = tries; try { localStorage.setItem('qt-ng-best', JSON.stringify(best)); } catch (e) { rec = true; } } lo = g; hi = g; $('msg').textContent = 'Yes! The number was ' + secret + '. You got it in ' + tries + ' ' + (tries === 1 ? 'try' : 'tries') + '.' + (rec ? ' New best! \ud83c\udfc6' : ''); } else if (g > secret) { if (g - 1 >= lo) { hi = Math.min(hi, g - 1); } $('msg').textContent = g + ' is too high. Go lower.'; } else { lo = Math.max(lo, g + 1); $('msg').textContent = g + ' is too low. Go higher.'; } $('in').value = ''; $('in').focus(); paint(); } function cpuStart() { max = +$('max').value; cg = { lo: 1, hi: max, n: 0 }; $('you').style.display = 'none'; $('cpu').style.display = ''; cpuAsk(); } function cpuAsk() { if (cg.lo > cg.hi) { $('cq').textContent = 'Hmm, the answers do not add up. Did you change your number? Press Restart.'; return; } cg.g = Math.floor((cg.lo + cg.hi) \/ 2); cg.n++; $('cq').textContent = 'Guess ' + cg.n + ': is your number ' + cg.g + '?'; } function cpuSay(a) { if (!cg) { return; } if (a === 'yes') { $('cq').textContent = 'I got it in ' + cg.n + ' ' + (cg.n === 1 ? 'guess' : 'guesses') + '! Your number is ' + cg.g + '. \ud83d\ude0e'; cg.lo = 1; cg.hi = 0; return; } if (a === 'higher') { cg.lo = cg.g + 1; } else { cg.hi = cg.g - 1; } cpuAsk(); } $('form').addEventListener('submit', function (e) { e.preventDefault(); guess(); }); $('new').addEventListener('click', newGame); $('max').addEventListener('change', function () { if ($('who').value === 'cpu') { cpuStart(); } else { newGame(); } }); $('who').addEventListener('change', function () { if (this.value === 'cpu') { $('cmsg').textContent = 'Think of a whole number from 1 to ' + $('max').value + '. Keep it secret, then answer my questions.'; cpuStart(); } else { newGame(); } }); $('hi').addEventListener('click', function () { cpuSay('higher'); }); $('lo').addEventListener('click', function () { cpuSay('lower'); }); $('yes').addEventListener('click', function () { cpuSay('yes'); }); $('restart').addEventListener('click', cpuStart); newGame(); }); })();<\/script><\/p>\n<div class=\"qt-next\">\n<p class=\"qt-next-h\">Play next<\/p>\n<div class=\"qt-next-g\"><a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/tic-tac-toe\/\">Tic Tac Toe<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/hangman\/\">Hangman<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/word-search\/\">Word Search<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/rock-paper-scissors\/\">Rock Paper Scissors<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/truth-or-dare\/\">Truth or Dare Generator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/halloween-word-search\/\">Halloween Word Search<\/a><\/div>\n<\/div>\n<p><strong>Quick answer:<\/strong> Type a number and press <strong>Guess<\/strong>. If your guess is too high, go lower; if it is too low, go higher. The bar and the &#8220;Still possible&#8221; box show how much of the range is left. With perfect play you can always find a number from 1 to 100 in 7 guesses, and from 1 to 1,000 in 10.<\/p>\n<h2>How to play the number guessing game<\/h2>\n<ol>\n<li>Choose a range: 1 to 10 for young kids, 1 to 100 or 1 to 1,000.<\/li>\n<li>Enter your first guess. Each guess shows up as a colored chip: red means too high, blue means too low.<\/li>\n<li>Keep narrowing it down until you find the number. Your best score for each range is saved.<\/li>\n<li>Switch to <strong>Computer guesses yours<\/strong>, think of a number and answer Higher, Lower or Yes.<\/li>\n<\/ol>\n<h2>The best strategy: halve the range<\/h2>\n<p>Always guess the middle of what is still possible. For 1 to 100, start with 50. If it is too high, try 25; if too low, try 75. Each guess cuts the possibilities in half, which is called a binary search. It is the same idea computers use to search sorted lists quickly.<\/p>\n<table class=\"qt-ref\">\n<thead>\n<tr>\n<th>Range<\/th>\n<th>Guesses needed with perfect play<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1 to 10<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>1 to 100<\/td>\n<td>7<\/td>\n<\/tr>\n<tr>\n<td>1 to 1,000<\/td>\n<td>10<\/td>\n<\/tr>\n<tr>\n<td>1 to 1,000,000<\/td>\n<td>20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Why kids love it<\/h2>\n<ul>\n<li><strong>Number sense.<\/strong> Kids practice comparing numbers and thinking about halves.<\/li>\n<li><strong>Quick rounds.<\/strong> A game takes under a minute, so it fits any break.<\/li>\n<li><strong>Role reversal.<\/strong> Watching the computer find their number in a few guesses feels like magic, until they learn the trick.<\/li>\n<\/ul>\n<p>Need a random number for something else? Use the <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/random-number-generator\/\">random number generator<\/a> or <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/dice-roller\/\">dice roller<\/a>. For more math fun, try the <a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/times-tables-game\/\">times tables game<\/a> or <a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/nim\/\">Nim<\/a>.<\/p>\n<h2>FAQ<\/h2>\n<h3>Is the secret number random?<\/h3>\n<p>Yes. It is picked with your browser&#8217;s secure random number generator each time you start a new game.<\/p>\n<h3>Can the computer always guess my number?<\/h3>\n<p>Yes, as long as you answer honestly. It needs at most 7 guesses for 1 to 100 and 10 guesses for 1 to 1,000.<\/p>\n<h2>More free games and tools<\/h2>\n<div class=\"qt-cards\"><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/tic-tac-toe\/\"><strong>Tic Tac Toe<\/strong><span>Play X and O against the computer or a friend.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/hangman\/\"><strong>Hangman<\/strong><span>Guess the word one letter at a time.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/word-search\/\"><strong>Word Search<\/strong><span>Find hidden words in themed puzzles.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/rock-paper-scissors\/\"><strong>Rock Paper Scissors<\/strong><span>Play rock paper scissors against the computer.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/truth-or-dare\/\"><strong>Truth or Dare Generator<\/strong><span>Random truth questions and dares for parties.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/halloween-word-search\/\"><strong>Halloween Word Search<\/strong><span>Spooky themed word search puzzles.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/christmas-word-search\/\"><strong>Christmas Word Search<\/strong><span>Holiday word search puzzles for all ages.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/christmas-trivia\/\"><strong>Christmas Trivia Quiz<\/strong><span>Ten festive questions with answers.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/charades-generator\/\"><strong>Charades Generator<\/strong><span>Random words to act out, with timer and scores.<\/span><\/a><\/div>\n<p>See all of them on the <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/\">QuickOnlineTips free online tools<\/a> page and the <a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/\">free online games<\/a> page.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Play the classic number guessing game. I pick a secret number from 1 to 100, and you try to find it. After every guess you are told whether to go higher or lower. Can you get it in seven tries or fewer? You can also switch roles and let the computer guess your number. Who&#8230;<\/p>\n","protected":false},"author":4,"featured_media":66838,"parent":66148,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"class_list":["post-66818","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/66818","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/comments?post=66818"}],"version-history":[{"count":1,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/66818\/revisions"}],"predecessor-version":[{"id":66828,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/66818\/revisions\/66828"}],"up":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/66148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/media\/66838"}],"wp:attachment":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/media?parent=66818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}