when 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

Results 1 to 3 of 3

- Mar 26th 2009, 02:23 AM #1

- Joined
- Mar 2009
- Posts
- 34

- Mar 26th 2009, 02:59 AM #2

- Joined
- Apr 2005
- Posts
- 19,175
- Thanks
- 2815

- Mar 26th 2009, 03:58 AM #3

- Joined
- May 2006
- From
- Lexington, MA (USA)
- Posts
- 12,028
- Thanks
- 847

Hello, kl050196!

We can solve this by Elimination.

When a 2-digit number is squared,

the result is the 3-digit number . . . i.e

The number that stands for is:

. .

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 . . .