Sum of all the integers between 10 and 99, which are divisible by 3 and 5 both, is

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19 Nov 2010 Number divisible by 3 and 5 Sum of all the integers between 10 and 99, which are divisible by 3 and 5 both, is: OPtion
1) 305
2) 425
3) 380
4) 350
5) 430
6) 455
7) 315
8) 295
9) 285
10) 385; Correct Option: 7 Best Solution (3)

SUDESHNA SEN 13 years AGO

Integers which are divisible by both 3 and 5, should be divisible by 3*5 or 15.
Now, integers between 10 and 99 which are divisible by 15 are 15,30,45,60,75 and 90.
So, their sum= 15+30+45+60+75+90
=15(1+2+3+...+6)
=15*{(6*7)/2}
=315..... Option 7)

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Mamon Sengupta 13 years AGO

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Trishita Dasgupta 13 years AGO

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Sum of all the integers between 10 and 99, which are divisible by 3 and 5 both, is

M4maths Previous Puzzles

19 Nov 2010 Number divisible by 3 and 5