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If it is possible to form a number which...

If it is possible to form a number which is perfect square of a two digit add number using the second, the fourth and the seventh digits of the number 739142658 using each only once, which of following is the second digit of that two digit odd number?

A

3

B

4

C

5

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
Given number
The second, fourth and seventh digits = 3 ,1 and 6 respectively
Possible three-digit numbers formed with these digits = `"316 361 139 163 613 and 631 "`
But perfect square = 361 only i.e `(19)^2`
So, Required two digit odd number = 19
Therefore, Unit.s place digit of .19. = 9.
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