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?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Look at the picture and find out which square is not linked with any of the other squares.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

Buy me, smell me or deliver me, I do not change.

Who am I?

No one wants to have it, but if one got it, he does not want to lose it. What is It?