If x is a positive integer, is x<16 ?
1) x is less than the average (arithmetic mean) of the first ten positive integers.
2) x is the square of an integer.
OA=A
If x is a positive integer...
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- BlindVision
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it happens...SanjeevK wrote:I am such a dumb. My Bad. Guess I have to be careful.iamcste wrote:average of first ten positive integers is 5.5SanjeevK wrote:A: average of first ten positive integers is 5.
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A:
The average of the first 10 numbers is 5.5...
(1 + 10) + (2 + 9) + (3 + 8) + (4 + 7) + (5 + 6) = 11 + 11 + 11 + 11 + 11 = 55,
so 55/10 = 5.5. If x < 5.5, x < 16 for sure.
Just because x is a perfect square, we can't say that x < 16. So we are done.
The average of the first 10 numbers is 5.5...
(1 + 10) + (2 + 9) + (3 + 8) + (4 + 7) + (5 + 6) = 11 + 11 + 11 + 11 + 11 = 55,
so 55/10 = 5.5. If x < 5.5, x < 16 for sure.
Just because x is a perfect square, we can't say that x < 16. So we are done.
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