Question:
How many multiples of 3 are there among the integers 15 to 105 inclusive?
How many multiples of 3 are there among the integers 15 to 105 inclusive?
Updated On: Oct 4, 2024
- 30
- 31
- 32
- 33
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The Correct Option is B
Solution and Explanation
The correct option is (B):Multiples of 3 are 15,18,21,…..102,105
This series is AP having first term a=15 , common difference d=3 , last number l=105
Total number of terms be n
using formula \(l=a+(n-1)d\)
\(105=15+(n-1)3\)
\((n-1)=30\)
\(n=31\)
This series is AP having first term a=15 , common difference d=3 , last number l=105
Total number of terms be n
using formula \(l=a+(n-1)d\)
\(105=15+(n-1)3\)
\((n-1)=30\)
\(n=31\)
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