Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Solve this riddle by finding the odd one out from the rest.

What has no start, end, or centre?

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

Why did the Girl throw the butter out of the window?

Why Wine Glass Stem is so long?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"