SSC CHSL Model Paper 3

Question : 26 of 100

Marks: +1, -0

QUANTITATIVE APTITUDE

How many numbers, between 1 and 300 are divisible by 3 and 5 together?

Solution:

LCM of 3 and 5 = 15
Number divisible by 15 are 15,30,45.....300.
Let total numbers are n

300= 15 + (n -1) × 15

300= 15+ 15n-15

⇒

n = 20

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