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

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

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

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

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

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

What number divided by 4 is the same as that number minus 4?

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

I am an odd number. Take away a letter and I become even. What number am I?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?