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 can go up a chimney down, but can’t go down a chimney up?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Can you find the dog hidden in a group of pandas?

I have branches, but no fruit, trunk or leaves. What am I?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

Who can jump higher than a Mountain?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle