5th Grade Brain Teasers

If it takes 5 machines 5 minutes to make 5 gadgets, how long would it take 100 machines to make 100 gadgets?

• 100 minutes

• 5 minutes

• 50 minutes

• 10 minutes

I am not alive, but I can grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

• A cloud

• Fire

• A rock

• A plant

If you have me, you want to share me. If you share me, you haven't got me. What am I?

• Money

• A secret

• Happiness

• Food

Solve the following word problem: If a basketball team wins 12 games and loses 8, what fraction of their games did they win?

What goes up when rain comes down?

• Temperature

• Umbrellas

• Trees

• Water level

You see a boat filled with people. It has not sunk, but when you look again you don’t see a single person on the boat. Why?

• They went below deck.

• The boat is invisible.

• They are all married.

• The boat is behind a fog.

A farmer has 17 sheep, and all but 9 die. How many are left?

• 8

• 9

• 17

• 0

What has keys but can't open locks?

• A map

• A piano

• A code

• A computer

If you're running a race and you pass the person in second place, what place are you in now?

• First

• Second

• Third

• It depends on the race.

What can travel around the world while staying in a corner?

• A stamp

• A plane

• The wind

• A boat