Math, asked by vithalmehatre92, 2 months ago

the fifth triangular number

Answers

Answered by Anonymous

19

Step-by-step explanation:

Mary knows that the 5th triangular number is 15 because it needs 15 counters to make the triangle.

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Answered by kashishrajput1801

5

Answer:

Step-by-step explanation:

Mary knows that the 5th triangular number is 15 because it needs 15 counters to make the triangle.

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