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

O T T F F S S ?

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

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

Find the hidden tiger in the given optical illusion ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

Solve the following series:
AZ, GT, MN, __, YB