What does below rebus means ?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Prove that twice of ten is the same as twice of eleven.

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What is the longest word in the dictionary?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

Which is the correct shadow of the bird?