I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

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

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What time is it when an elephant sits on a fence?

Identify the hidden meaning behind this picture?