If 16^2=31 And 17^2=61 Then 13^2 is

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13 Jul 2009 solve the equation

If 16^2=31
And 17^2=61
Then 13^2 is

OPtion

1. 11
2. 25
3. 49
4. 21
5. 01
6. 52
7. 53
8. 51
9. 64
10. 92

Solution

16^2 = 256 = (5-2)*10+(6-5) = 31
17^2 = 289 = (8-2)*10+(9-8) = 61
Similarly
13^2 = 169 = (6-1)*10+(9-6) = 53

Correct Option: 7 Best Solution (0)