10+10 and 11+11 can give you the same answer.

Explain how?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

What does this rebus riddle means ?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

How can you make number one disappear by adding something to it?