Question
If xxyy is a perfect square then x + y =?
Answer: Option C
:
C
xxyy = xx00 + yy = 11(x00 + y) = 11(x0y)
xxyy is a perfect square, so if one divisor is 11, then there should be one more 11 to get 112
As xxyy = 11(x0y) .x0y should be divisible by 11, so x + y has to 11.
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:
C
xxyy = xx00 + yy = 11(x00 + y) = 11(x0y)
xxyy is a perfect square, so if one divisor is 11, then there should be one more 11 to get 112
As xxyy = 11(x0y) .x0y should be divisible by 11, so x + y has to 11.
Was this answer helpful ?
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