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

What Word am I Looking For ?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

Decode the movie name from the below picture?

Can you start the fire using two pieces of wood?

Can you make four (4) nines (9) equal 100?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.