On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

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

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

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?

Find out the missing number in the picture attached:

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

You need to arrange three 7 and mathematical symbols to form number 1?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211