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Find the next term in the pattern: 1, 3, 6, 10, 15, ?

Class 8Patterns in NumbersNumber System
  • A18
  • B20
  • C21
  • D25

Step-by-Step Solution

These are triangular numbers; differences are 2, 3, 4, 5, so add 6: 15 + 6 = 21.
Answer: C) 21

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