The greatest integer by which `1+sum_(r=1)^(30)rxxr !` is divisible is a. composite number b. odd number c. divisible by 3 d. none of these

Find the sum of all numbers from 1 to 140 which are divisible by 4.

Given below are two pairs of statements. Combine these two statements using ''if and only if ''. (i) p: If a rectangle is a square, then all its four sides are equal. q: If all the four sides of a rectangle are equal, then the rectangle is a square. (ii) p: If the sum of digits of a number is divisible by 3, then the number is divisible by 3. q: If a number is divisible by 3, then the sum of its digits is divisible by 3.

Find the sum of all three-digit natural numbers, which are divisible by 7.

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.

Find the sum of all numbers between 200 and 400 which are divisible by 7.