Money For Answers

A dad offered to pay his son $5 for every correct answer on his math test. His son said he would pay his Dad $8 for every incorrect answer. There were 26 questions on the test and no money was exchanged.

How did this happen?

The son got 16 questions correct and missed 10. This means he owed his Dad 10 * $8 = $80, but his Dad owed him 16 * $5 = $80, so it was a wash.
Two math equations to solve it are x + y = 26 and 5x = 8y.

Posted in Brain Teasers

Not Burned in Fire Nor Drowned in Water

What can’t be burned in a fire nor drowned in water?

Ice. It melts instead of burning in a fire and it floats in water.

Posted in Riddles

You Melted My Ice

A full glass of water with a single ice cube sits on a table. When the ice has completely melted, will the level of the water have increased, decreased or remain unchanged?

The water level remains unchanged because the ice cube displaces its own weight. If you’re not convinced, read Archimedes’ Principle, which states that any floating object displaces its own weight of fluid. Still not convinced? Here are a few more sources.

Posted in Brain Teasers

Loud Linda

Linda is 31 years old, single, outspoken, and very bright. She majored in philosophy. As a student, she was deeply concerned with issues of discrimination and social justice, and also participated in anti-nuclear demonstrations.

Which is more probable?

1) Linda is a bank teller.
2) Linda is a bank teller and is active in the feminist movement.

1) Linda is a bank teller.

Most people guess number two, but the probability of two events occurring together is always less than or equal to the probability of either one occurring alone. This problem is known as the Conjunction Fallacy.

Posted in Riddles

In A Dark Room with a Rope and a Pencil

Imagine you are in a dark room with a locked door. All you have with you is a rope and a pencil. You can hear the rain outside, but there
are no windows. How do you get out?

Stop imagining.

Posted in Riddles
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Asleep, Parts, Ideals Trianagrams

Rearrange the letters of the first word to form a new one, then rearrange the letters of the new word to form a third.

ASLEEP _ _ _ _ _ _ _ _ _ _ _ _
PARTS _ _ _ _ _ _ _ _ _ _
IDEALS _ _ _ _ _ _ _ _ _ _ _ _

1. ASLEEP, PLEASE, ELAPSE
2. PARTS, TRAPS, STRAP (TARPS or SPRAT also work)
3. IDEALS, SAILED, LADIES

Posted in Brain Teasers

Spell check

Which word is always spelled wrong?

The word “wrong”.

Posted in Brain Teasers

I’m Located In the Middle of Nowhere

I am located in the middle of nowhere. What am I?

The letter ‘h’. It is the middle letter of the word ‘nowhere’

Posted in Riddles

Thought Rebus

What does this represent?

          but
thought thought

But on second thought.

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A Green Ranch

There’s a green ranch house on a green street with green walls, tables and chairs. What color is the staircase?

There is no staircase, it’s a ranch.

Posted in Brain Teasers