What is the median of all possible factors of 120 ?

What is the sum of all the divisors of 256?

If the median of observations 12, 1, 8, 54, 61, 28, 45, 35, 21, 17 is M, then what is the value of 2M + 5?

What is the digit at the 100th place of number (225)⁴⁰ ?

What is the LCM of 3·6, 0·009, 0·27?

What is the last digit of the sum S = 9²⁷ + 27⁹ ?