### Brain Teasers

# 31, 3, 5, 11, 23, 13

Series
Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.

Transform the following numbers into a palindromic sequence (one that reads the same backwards as forwards) by applying the same formula to all the numbers. What is the formula and what are the resulting numbers?

31, 3, 5, 11, 23, 13

31, 3, 5, 11, 23, 13

### Answer

Square each number to get the palindrome:961, 9, 25, 121, 529, 169

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