The sum of a positive number 'A' and its square is 420. Find the value of (A2 - 7A).
Find the unit digit of the expression: 1! + 4! + 6! + 9! + 25!.
A two-digit number is 4 times the sum of its digits. If 27 is added to the number, the digits interchange their places. What is the number?
Out of 3 β4, β2, 6 β3, 4 β5 which number is the biggest?
What is the digit in the units place of the number (1624)24 ?
Find the remainder when 5123 is divided by 8.
The sum of a positive number 'A' and its square is 156. Find the value of (A2 - 7A).
- If 519x238y is divisible by 72, then find (2x - 4y).
- Find the remainder if

A number becomes 90 more than itself when 120% of it is added to it. What number is obtained after the addition?