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Look for the rule and give the next term: 3, 4, 10, 33, 136, ?

Competition practiceNumber Series

A680
B685
C690
D681

Step-by-Step Solution

×1 + 1 =

4, \times 2 + 2 = 10, \times 3 + 3 = 33, \times 4 + 4 = 136

, so next is

136 \times 5 + 5 = 685

.

Answer: B) 685

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