Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

What's a single-digit number with no value?

Find the next number in the sequence

5 12 24 36 ?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?