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1, 3, 7, 15 ,____ ഈ ശ്രണിയിലെ അടുത്ത സംഖ്യ ഏത് ?

A25

B31

C30

D33

Answer:

B. 31

Read Explanation:

1 + 2 = 3

3 + 4 = 7

7 + 8 = 15

15 + 16 = 31


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