Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

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?

Can you find out which options fits best with the missing column?

What word is pronounced the same if you take away four of its five letters?

Using Only Five 5's and any mathematical operator make sum as 37

Can you solve this picture maths equation?

What has to be broken before you can use it?

How many times do a clock's hands overlap in a day ?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?