In the two numerical sequences below, one number that appears in the top sequence should appear in the bottom sequence and vice versa. Which two numbers should be changes round? 10, 20, 31, 43, 54, 70. 10, 18, 28, 40, 56, 70.
Answer: 54 and 56 should be swapped round
Explanation
10, 20, 31, 43, 54, 70.
10, 18, 28, 40, 56, 70.
10 + 8 = 18
18 + 10 = 28
28 + 12 = 40
40 + 14 = 54
54 + 16 = 70
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