No.
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The nth triangular number (n must be a whole number > 0) is given by:
tn = 1/2 n(n+1)
Testing for 49:
1/2 n(n+1) = 49
→ n2 + n - 98 = 0
→ n = (-1 ± √393)/2
but 393 is not a square number, so n cannot be a whole number which it must be for a triangular number; thus 49 is not a triangular number.
No, it is just a suare number
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.
No, it is just a suare number
Is 63 a triangular number I think it is a triangular number.
013
no it is not a triangular number
Decimal triangular number it is
They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.
36 is a triangular number, Square number and also a Consecutive number.
No, 33 is not a triangular number.
No, 172 is not a triangular number.
No, 324 is not a triangular number!
No, 18 is not a triangular number.
No, 35 is not a triangular number.