Question

If it is possible to make a number which is the square of a two-digit odd number using the second, the fourth and the sixth digits of the number 93217648 and using each only once, which of the following is that two-digit odd number?

• A. 17
• B. 19
• C. 15
• D. 21

Answer 1

The correct option is B 19

Second, fourth and the sixth digits of the number are 3, 1 and 6. Using these digits only once we can make 361, which is a perfect square number. Hence, our answer is $\sqrt{361}=19$