List of top Quantitative Aptitude Questions on Number Series

Find the missing number in the series: \(2, 6, 12, 20, 30, \_\_\).
Complete the series: \(285,\,253,\,221,\,189,\,?\)
Given the sequence of numbers 2, 3, 5, 7, 11, 13, 17, 19, 23, _ _ _ _ _. What are the next two numbers?
The 20th term in the triangular numbers 1, 3, 6, 10, 15, 21, ... is
Instructions: A numerical machine accepts two values X and Y. At every step, it updates the values as X = X times Y, and Y = Y + 1. The machine stops as soon as X becomes greater than or equal to N.

For X = 3, Y = 2 and N = 100, how many steps are performed before the machine stops?
Instructions: A numerical machine accepts two values X and Y. At every step, it updates the values as X = X times Y, and Y = Y + 1. The machine stops as soon as X becomes greater than or equal to N.

If X = 2 and Y = 3, what should be the minimum value of N (from the options given) such that the final value of Y is 7?
Instructions: A numerical machine accepts two values X and Y. At every step, it updates the values as X = X times Y, and Y = Y + 1. The machine stops as soon as X becomes greater than or equal to N.

Using the same values as the previous question (X = 3, Y = 2, N = 100), what is the final value of X?
Instructions: A numerical machine accepts two values X and Y. At every step, it updates the values as X = X times Y, and Y = Y + 1. The machine stops as soon as X becomes greater than or equal to N.

Using the same values as before (X = 3, Y = 2, N = 100), what is the final value of Y?
Instructions: A numerical machine accepts two values X and Y. At every step, it updates the values as X = X times Y, and Y = Y + 1. The machine stops as soon as X becomes greater than or equal to N.

Starting again from X = 3, Y = 2, if the value of N is changed to 500, what would be the final value of X?
The sum of prime numbers that are greater than 60, but less than 70 is:
The missing numbers in the following series would be:
1 : 1, 8 : 4, 9 : 27, 64 : 16, 25 : 125, ? : ?, 49 : 343
Two different prime numbers X and Y, both are greater than 2, then which of the following must be true?
Find out the appropriate next number in the series from the options below: 0, 2, 6, 12, 20, 30, 42, ?