2550 This is an Arithmetic Progression. Sum of an AP = (No. of terms/2)*(First term + Last term) => Sum of given series = (50/2)*(2 + 100) = 25*102 = 2550. read more
This is an arithmetic series where the first number is 6, the last one is 100, and you're adding 2 to each number to get the next. You don't need a calculator. read more