My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

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

What is the largest number you can write with just 3 digits?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

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

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Find the number of squares in the below-given picture.

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

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.