47 is not a triangular number. Triangular numbers less than 100 are 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, and 91.
Chat with our AI personalities
Is 63 a triangular number I think it is a triangular number.
013
No, 18 is not a triangular number.
No, 35 is not a triangular number.
yes it is a triangular number