??
What is the next number in this sequence:
1 · 1 · 2 · 4 · 3 · 9 · 4 · 61 · 5 · 52 · 6 · 63 · 7 · 94 · 8 · ?
Puzzle Copyright © Kevin Stone
workings hint hide answer print
Answer
46.
Reasoning
Take the numbers in pairs, square the first, and reverse the digits.
1 1 (1 x 1 = 1, reversed is 1)
2 4 (2 x 2 = 4, reversed is 4)
3 9 (3 x 3 = 9, reversed is 9)
4 61 (4 x 4 = 16, reversed is 61)
5 52 (5 x 5 = 25, reversed is 52)
6 63 (6 x 6 = 36, reversed is 63)
7 94 (7 x 7 = 49, reversed is 94)
so we require:
8 46 (8 x 8 = 64, reversed is 46)