You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

What is the next number in the series?

15 29 56 108 208 ?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?