can u tell me a number whose square is 12345678987654321?

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can u tell me a number whose square is 12345678987654321?

2006-11-21 03:00:53 · 4 answers · asked by zimzy_999 2 in Science & Mathematics ➔ Mathematics

4 answers

Who needs Excel or calculator?
There is a special formula for such numbers. The middlemeost digit of such a number reflects the number of 1's in the square root. The only digit in the square root is 1.
1^2=1
11^2=121
111^2=12321
1111^2=1234321
11111^2=123454321
111111^2=12345654321
1111111^2=1234567654321
11111111^2=123456787654321
111111111^2=12345678987654321

2006-11-21 20:13:03 · answer #1 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋

111111111

2006-11-21 03:03:52 · answer #2 · answered by virendra s 2 · 0⤊ 1⤋

111111111

2006-11-21 03:03:11 · answer #3 · answered by Tom :: Athier than Thou 6 · 0⤊ 1⤋

111111111

from calculator =)

2006-11-21 03:11:12 · answer #4 · answered by dibujojoe 2 · 0⤊ 1⤋