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About LinkBackswhen two digit number KY is multiplied by itself, the result is the 3 digit number ZLK i.e(KY) x(KY) = ZLK. The number that K stands for is
a)1 or 9
b)2 or 6
c)3
d)1
The statement of the problem implies that "Y" does not matter. What is 19*19. Is it a 3 digit number? What about 99*99, 29*29, etc.?Originally Posted by kl050196
Since you are squaring, another way to do this is to look at. What does that tell you?
Hello, kl050196!
We can solve this by Elimination.
The answer cannot be (a) sinceWhen a 2-digit numberis squared,
the result is the 3-digit number. . . i.e
The number thatstands for is:
. .\;1\text{ or }9 \qquad (b)\;2\text{ or }6 \qquad (c)\;3 \qquad (d)\;1)
The answer cannot be (b) because a square cannot end in 2.
The answer cannot be (c) because a square cannot end in 3.
Therefore . . .
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