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?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What has 13 hearts but no other organs?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Count the Triangle in the figure given below: