By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

Can you count the number of triangles inside a triangle?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

I know a nine-letter word having only one vowel.
Do you ?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

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