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What is the next number: 1, 2, 6, 15, 31, ?

Competition practiceAlphanumeric / Series
  • A47
  • B56
  • C62
  • D52

Step-by-Step Solution

The differences are 1, 4, 9, 16 (squares). The next difference is 25: 31 + 25 = 56.
Answer: B) 56

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