What does this mathematical rebus means ?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

What's a single-digit number with no value?

John was drowned by he was not wet. How?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

What is 3/7 chicken, 2/3 cat and 2/4 goat?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?