Find the sum of odd integers from 1 to 2001

Find the sum of integers from 1 to 100 that are divisible by 2 or 5

Find the sum of integers from 1 to 100 that are divisible-by 2 or 5 .

Read the following and answer the questions given below. 1,2,3,4….are natural numbers or counting numbers. The sum of first 4 numbers is 1+2+3+4=(1+4)+(2+3) = 5+5 = 5xx2 =(4+1)+4/2 We can make pairs as given above and can establish a formula to find the sum of first n natural numbers as sum = (1+n)xxn/2 Calculate the sum of natural numbers from 10 to 20.

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

Find the number of integers between 100 and 800 each of which on division by 16 leaves the remainder 7.Find the sum of these integers.

Calculate the arithmetic mean of even numbers' and odd numbers from 1 to 100 ?