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Earn +20 ptsQ: Is 28 a triangular number
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Is 29 a triangular number?
no- 29 is not triangular. The triangular numbers closest to 29 are 28 and 36.
If the eighth triangular number is 36 what is the seventh trianguler number?
28"21" but to be extra smart the answer is "The seventh triangular number is twenty one."
Is 25 a triangular number?
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.
What is the seventh triangular number?
There is a very simple formula. The nth triangular number, T(n) = n*(n+1)/2Here n = 7, so T(7) = 7*8/2 = 28.
Is 8 triangular number?
No. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, ...
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