if 3is first triangular number which is fifth one?
1 ) 15
2) 21
3) 28
Answers
Answered by
2
Answer:
1] 15
Step-by-step explanation:
= 3*5
=15
Plz mark me brainleast
Answered by
1
Answer:
15
Step-by-step explanation:
3*5
15 answer is 15
ok I hope
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