The sum of the integers from 1 to 100 which is divisible by 3 but not 5 is
Answers
Answered by
0
Answer:
is that a question?
Explanation:
i guess so...
Answered by
0
Answer:
315
Explanation:
LCM of 3 and 5 is 15.
The numbers between 1 and 100 which are divisible by both 3 and 5 are 15, 30, 45, ..90
a = 15
an = 90
d = 15
a+(n-1)d = 90
15+(n-1)15 = 90
n = 90/15 = 6
Sum = (n/2)(first term + last term)
= (6/2)(15+90)
= 3(105)
= 315
Similar questions