A series of numbers is given: 3, 7, 15, 31. Each new number is obtained according to one rule. What number should come next?
Show hints
- Compare each number with double the previous one.
- 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.