1.

If it is possible to form a number with the first, the fourth and the seventh digits of the number 4671358, which is the perfect square of a two-digit odd number, which of the following will be the digit in the tenth place of that two digit odd number ? lf no such number can be formed, give 'O' as the answer and if more than one such number can be made, give 'X' as the answer

Answer»

2
9
3
O

Solution :
`841 = (29)^2`
DIGIT at TENTH place =2


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