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Consider the sequence of differences: from 1 to 4 the gap is 3, from 4 to 9 the gap is 5, from 9 to 16 the gap is 7.
What is the gap between the next pair (16 to 25)?

Class 6Patterns in Whole NumbersWhole Numbers
  • A18
  • B8
  • C9
  • D10

Step-by-Step Solution

These are consecutive square numbers; the gaps are consecutive odd numbers 3, 5, 7, 9. So 25 - 16 = 9.
Answer: C) 9

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