Grade 3 problem

Patterns · Grade 3

A series of numbers is given: 3, 7, 15, 31. Each new number is obtained according to one rule. What number should come next?

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  1. Compare each number with double the previous one.
  2. Double 31 and add 1.
Show the answer and solution

Answer: 63

The previous number is doubled each time and 1 is added. After 31 we get 31 × 2 + 1 = 63.

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