Discussion
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?
Answer: B
Correct answer: 19
The second, fourth and sixth digits of 93217648 are 3, 1 and 6. Arranged as 361 they give \( 19^2 \), and 19 is a two-digit odd number - so the number whose square can be formed is 19.
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