Which is the incorrect term in the following series?

45, 46, 94, 285, 1144, 5720

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285

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1144

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5720

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Solution

The correct option is E
5720

The series is $\times 1 + 1, \times 2 + 2, \times 3 + 3, . . .$

i.e. $45 \times 1 + 1 = 46, 46 \times 2 + 2 = 94, 94 \times 3 + 3 = 285, 285 \times 4 + 4 = 1144, 1144 \times 5 + 5 = 5725$

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