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
changed round?
2, 2.5, 4.5, 6.75
1, 3, 6.25, 15.625

2.5 and 3. In the top sequence the numbers progress × 1.5. In the bottom sequence the numbers progress × 2.5.


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