There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

What four weights can be used to balance from 1 to 30 pounds?

Can you name an animal whose killing cannot be performed without spilling your own blood?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"