Find the wrong term in the following series: 12, 25, 50, 150, 600, 3000.

Correct answer: 12

Solution

The intended pattern is likely multiplication by 2, 3, 4, 5, and 6: 25, 50, 150, 600, 3000. That means the first term should have been 25/2 = 12.5, so 12 is the wrong term.

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