Math, asked by osandeepjain, 8 months ago

3. Which of the following is not a triangular number?
(a) 21
(b) 36
(c) 45
(c) 54

Answers

Answered by dhrugupt

5

Step-by-step explanation:

54 is not a triangular number. The nearest number to it is 55 that is a triangular number.

Please mark as brainliest

Answered by Anonymous

5

54..iss not a triangular no...

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