How do you go from 98 to 720 using just one letter?

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

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?

What is next number in the pattern below:

131 517 192 123 ?

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

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

What's a single-digit number with no value?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I