Consider the multiples of 7 in between 100 and 500. What are the first and last numbers ?

Consider the multiples of 7 in between 100 and 500. How many terms are there in the sequence ?

Find the sum of multiple of 7 between 200 and 400.

How many multiples of 7 are there in between 100 and 300 ?

What is the sum of first 20 natural numbers?

What is the sum of first 30 natural numbers?

What is the sum of the first 'n' natural numbers?

The average of five consecutive multiples of 3 is 90 . What is the middle numbers? What are the other numbers?

Find the sum of all integers between 50 and 500 which are divisible by 7:

Observe the number pattern made using terms of an arithmetic sequence 2, 6,10, ... . Find the first and the last numbers in the 20th line.

Which are the numbers between 1 and 100 having exactly three factors?