Find the sum of all multiples of 6 between 100 and 1000.

Multiples of 6 are: 6, 12, 18, 24, etc. multiplication is just repeated addition; this is an arithmetic sequence.the sum of an arithmetic sequence with n terms:   determine the first and last multiples of 6 between the two bounds, 100 and 1000.do 100 / 6 on a calculator. you get 16.6667, so you have to multiply that rounded up number by 6. 6 * 17 = 102, so that is the first multiple.do 1000 / 6 on a calculator. you get 166.7 so round down. multiply the rounded down version by 6. 6 * 166 = 996.the first term of this arithmetic series is 102, so . the last term is 996, so . the common difference is 6, so .find the number of terms with the explicit rule: so82350