Mathematics — Search Strategies · Higher/lower number-guessing activity

Speak Guess Number

Use larger/smaller feedback to narrow a possible number interval while treating voice input as optional.

Portrait activity · keep the device upright for the intended layout

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📝 Description

Speak Guess Number is a speech-based number guessing activity. The game selects a hidden number and the player uses spoken guesses to find it within a limited number of turns. It supports number sense, estimation, listening, and browser-based speech interaction.

📋 Instructions

Allow microphone access if prompted, then speak your number guesses clearly. Use feedback from each attempt to narrow the range and find the hidden number.

🎓 Learning Guide: Speak Guess Number

Learning focus: Use larger/smaller feedback to narrow a possible number interval while treating voice input as optional.

Mathematics — Search Strategies Higher/lower number-guessing activity

Learning objectives

Use each comparison to eliminate impossible guesses
Explain the midpoint idea behind interval halving

Concepts and principles

For an integer interval, guessing near the midpoint can reduce the remaining possibilities efficiently.
A “higher” or “lower” response changes the feasible range, assuming the game gives truthful feedback.

Examples and worked solutions

Separate teaching example (not verified as a native game question): A secret integer lies between 1 and 100 inclusive. You guess 50 and learn it is higher; what interval remains?: Worked solution: 51 through 100, assuming “higher” means the hidden integer exceeds 50.

Guided practice

Begin with the displayed number range if shown
Make a guess and update your written lower and upper bounds from game feedback
If voice recognition fails, use any available nonvoice input rather than treating speech as mandatory

Expected observations and explanations

Good guessing uses evidence from previous attempts instead of choosing numbers randomly.

Assessment questions and answers

Why might 75 be a sensible next guess after being told the number exceeds 50?: Answer: It approximately halves the remaining 51–100 interval.
Does the package evidence guarantee speech recognition in every browser?: Answer: No. Browser microphone/speech capabilities were not runtime tested.

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