1.

What will be the average of the first 7 positive odd numbers divisible by 5?1). 452). 353). 404). 32

Answer»

Average of the FIRST 7 positive odd numbers divisible by 5

First positive odd number which divisible by 5 = 5

Second positive odd number which divisible by 5 = 15

So on, SEVENTH positive odd number which divisible by 5 = 65

So, the series is in A.P (5, 15, 25, 35, 45, 55, 65)

We know, Average of any AP = (first TERM + last term)/2 = (5 + 65)/2 = 70/2 = 35


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