The sum of the first n natural numbers | 9math

Sep 5, 2007 . What is the sum of the first n natural numbers? Let's look at this problem for n=1, 2, 3, 4, and 5 and calculate the sum: 1=1 1+2=3 1+2+3=6 .

http://www.9math.com/book/sum-first-n-natural-numbers

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4 Ways to Add 5 Consecutive Numbers Quickly - wikiHow

Jun 27, 2012 . Bet someone you can add five consecutive integers faster than they can. . 5. That number is the answer -- the same as if we did the sum. . How to Calculate Your Age by Chocolate · How to Double Your Salary Using an .

http://www.wikihow.com/Add-5-Consecutive-Numbers-Quickly

Calculate the Mean - How to Calculate the Mean or Average

Among other things, this will allow you to calculate your grade point average. . For a set of numbers, {x 1, x2, x3, ... xj} the mean or average is the sum of all "x" . add up the numbers and divide by how many numbers you have (5 of them, .

http://chemistry.about.com/od/workedchemistryproblems/a/calculate-the-mean.htm

To get the sum of digits of a five digit number

. void main(void) { int d1,d2,d3,d4,d5,sum; long num; printf("Enter a five digit number: " . Try typing 50000%10 on calc, it equals 0.

http://cboard.cprogramming.com/c-programming/104143-get-sum-digits-five-digit-number.html

If a five digit number is input through the keyboard write a program to ...

If a five digit number is input through the keyboard write a program to calculate the sum of its digits? In: Keyboarding, Computer Keyboards [Edit categories] .

http://wiki.answers.com/Q/If_a_five_digit_number_is_input_through_the_keyboard_write_a_program_to_calculate_the_sum_of_its_digits