If the fifth term of a GP is 81 and first term is 16, what will be the 4<sup>th</sup> term of the GP?

How many 2-digit positive integers are divisible by 4 or 9?

If a + 1, 2a + 1, 4a - 1 are in A.P., then the value of a is:

If the first, second and last term of an A.P. are a, b and 2a respectively, its sum is

If $$\frac{1}{{x + 2}},$$  $$\frac{1}{{x + 3}},$$  $$\frac{1}{{x + 5}}$$   are in A.P. then x…

What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?

If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are

What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3?