Series Question Help Needed Thaxs (1 Viewer)

[yinyin]

FIND THE SUM OF ALL INTERGARs between 1 and 100 that are not multiples of 6!
thanks~

 

[Affinity]

Sum of ALL integers from 1 to 100 = 5050

Sum of the multiplies of 6 between 1 and 100 = 6 + 12 + ... + 96
= 16*(6+96)/2 = 816

so your answer is 5050-816 = 4234

 

[yinyin]

yep! thanks~ that is de correct anwer~