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Puzzle Zone

Flex your math muscles with these fun brainteasers!

February 2022
By Jessica McKenna-Ratjen

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Brainteaser

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Henry’s Hot Cocoa

Henry makes his famous hot chocolate with one 8-ounce bar of dark chocolate per cup. But today, his chocolate supplier sent him  1/2-pound bars instead of 8-ounce bars! “That’s ok,” Henry said. “I’ll just use twice as many!”

What was Henryʼs mistake?

Area Puzzle

Museum Mix-Up

The Midtown Museum is about to be built! But someone forgot to write in the measurements of a few walls. Can you help fill in the missing measurements?

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Logic Puzzle

Celina Selects a Seat

Celina Stevens dislikes being in an even-numbered seat. She also hates sitting behind any seat that is a prime number! Circle the empty seat in the theater that would be best for Celina.

KEY:
0 = Empty
x = Filled

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Find the Rule

Number Cruncher

The Number Cruncher crunches numbers down to size! Find the rule the Number Cruncher uses to crunch its numbers when the cans pass through the machine.

What is the rule?

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ANSWERS: BRAINTEASER: 1 lb = 16 oz, so   lb = 8 oz, Henry should have used the same amount as usual; Area PUZZLE: 1. 185 ft, 2. 80 ft, 3. 75 ft, 4. 100 ft; NUMBER CRUNCHER: The rule is divide by 5; LOGIC PUZZLE: Celina can sit in seat 7.

Algebraic Thinking
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Lesson Plan (1)
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