Question 14
Three of the following four pairs of numbers are alike in a certain way and one is different. Find the odd one out.
Solution
Let us examine the pattern in difference between the stated numbers.
153-136 = 17 -> Prime number
171-152 = 19 -> Prime number
72-63 = 9 -> Non-prime number
117-104 = 13. -> Prime number
Hence, the pair 72-63 is the odd pair among the given 4 pair of numbers.
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