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  1. What is the average of the first six (positive) odd numbers each of which is divisible by 7?
    1. 42
    2. 43
    3. 47
    4. 49
Correct Option: A

The first six (positive) odd numbers each of which is divisible by 7 -
7 , 21 , 35 , 49 , 63 , 77
Sum of five prime numbers = 7 + 21 + 35 + 49 + 63 + 77

Required average =
7 + 21 + 35 + 49 + 63 + 77
6

Required average =
7(1 + 3 + 5 + 7 + 9 + 11)
6

Required average =
7 × 36
6

Required average = 42



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