36
36 is a triangular number. The formula for the nth triangular number is, n(n + 1)/2. So, 36 is the 8th triangular number : 8 x 9/2 = 36
no- 29 is not triangular. The triangular numbers closest to 29 are 28 and 36.
28"21" but to be extra smart the answer is "The seventh triangular number is twenty one."
No - but it is a square number. 1,3,6,10,15,21 & 28 are all triangular numbers. 1,4,9,16,25 & 36 are all square numbers.
36
36 is a triangular number. The formula for the nth triangular number is, n(n + 1)/2. So, 36 is the 8th triangular number : 8 x 9/2 = 36
No, 39 is not a triangular number. The closet triangular numbers are 36 and 45.
1 and 36
36
no- 29 is not triangular. The triangular numbers closest to 29 are 28 and 36.
The formula for the nth triangular number is n(n+1)/2. If the 8th triangular number is 36, then we can set up the equation 8(8+1)/2 = 36. Solving for n, we get n = 7. Therefore, the 7th triangular number is 7(7+1)/2 = 28.
1, the first triangular number, is also a square.
36 is the only square number that is also a triangular number between 20 and 40.
36 is the smallest non-trivial number. It is both square and triangular.
32 is not a triangular number. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, 36, 45, ...
28"21" but to be extra smart the answer is "The seventh triangular number is twenty one."