If it is possible to form a number which is a perfect square of a two digit odd number using the second, fourth, seventh digits of the number 739142658 using each only once, which of the following is the second digit of that two-digit odd number?
Answer: D) none
The 2nd, 4th, 7th digits are 3, 1, 6 respectively.
The perfect square of a two-digit odd number, formed using these digits, is 361
If the first 10 terms and the last 10 terms of the given expression are interchanged in such a way that the first term is interchanged with the last, the second with the second last, the third with the third last and soon, what will the fifth term from the right be in the new arrangement?