Which number would replace the blank in the following sequence

12, 25, 51, 103, , 415

207

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205

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209

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208

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Solution

The correct option is A 207
Each next term of the sequence is formed by multiplying the previous term by 2 and adding 1.

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Similar questions

Question 5 (c)

Which of the following numbers are co-prime:
30 and 415

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