If ‘a’ is a natural number, then (7a2 + 7a) is always divisible by:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 7 and 14 both
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Understanding Tricks |
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Application (7a2 + 7a) The least natural number is 1 So The least value = 7(1)2 + 7(1) = 7 + 7 = 14 |
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Hence this number is divisible by 7 and 14 both |