Math Patterns
Choose the correct option in place of question mark (?) in the following series:
2, 3, 13, 4, 5, 41, 6, 7, (?), (?).
(a) 8, 85
(b) 85, 8
(c) 9, 91
(d) 7, 49
Solution:
2, 3, 13 = 2^2 + 3^2 = 4 + 9 = 13
4, 5, 41 = 4^2 + 5^2 = 16 + 25 = 41
6, 7, (?) = 6^2 + 7^2 = 36 + 49 = 85
2, 3, 13, 4, 5, 41, 6, 7, 85, 8
Answer: 85, 8
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