Riddles and Brain Teasers - Page 40 of 129 - Hopping Up Your Brain

Square Root Equations

Arrange the digits 1 through 9 into an equation so that the first number is the square root of the second number. (Two possible variations)

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567² = 321,489

OR

854² = 729,316

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Which Are True and Which Are False?

A. When a car is driven forwards the wheels rotate counter-clockwise.
B. If a clock is put forward 1 1/4 hours the minute hand moves through 450°
C. When a clock reads 4.10 the acute angle between the hands is exactly 60°

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A. False – The near-side wheels rotate counter-clockwise, but the far-side wheels rotate clockwise.
B. True
C. False – The acute angle is a little more than 60° because by the time the minute hand reaches 10, the hour hand will have moved slightly past the 4.

A. False – The near-side wheels rotate counter-clockwise, but the far-side wheels rotate clockwise.
B. True
C. False – The acute angle is a little more than 60° because by the time the minute hand reaches 10, the hour hand will have moved slightly past the 4.

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Dwarves and Snow White

The dwarves and Snow White sit down for a bite.
How fast can you guess what she serves her guests next?

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Seven Seconds

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A Leathery Snake

A leathery snake,
With a stinging bite,
I’ll stay coiled up,
Unless I must fight.

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A whip.

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One Six Seven Nine to Twenty Four

Given the numbers 1, 6, 7 and 9, find an equation that equals 24. You may only use each digit once.

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91 – 67 = 24 or
(9 – 6) x (7 + 1) = 3 x 8 = 24 or
6 x √9 + 7 – 1 = 18 + 6 = 24

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Counting Your Presents

According the song “The Twelve Days of Christmas”, how many total gifts were received?

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364. Here’s the explanation.

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Least Sleepy Month

In what month do people sleep the least?

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February, because there are fewer days.

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A Headless Kiss

What do you kiss that has a neck but no head?

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A bottle.

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Commonly Forgotten And Sometimes Rotten

I am always with you
But commonly forgotten.
You use me constantly,
And can sometimes be rotten.

What am I?

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Air.

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2 + 2 = 5

What is the similarity between “2 + 2 = 5” and your left hand?

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Neither is right. Two plus two equals five isn’t right, or correct and your left hand is not your right hand.

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