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Yes - 28 is equal to 1 + 2 + 3 + 4 + 5 + 6 + 7.
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∙ 13y ago
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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, ...
The 8th triangular number is 36 what is the 7th triangular number?
28
Is 28 an triangular number?
Yes.
Is 29 a triangular number?
no- 29 is not triangular. The triangular numbers closest to 29 are 28 and 36.
Is 32 a triangular number?
32 is not a triangular number. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, 36, 45, ...
Triangle number of 28?
28 is a triangle number. The 28th triangle number is 406.
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.
Is 26 a triangular number?
28 is a triangular number because it is the sum of the integers 1 through 7. The next larger triangular number is 36, the sum of the integers 1 through 8. Therefore 26 is not a triangular number. Notice 28 = 7 times 8 divided by two and 36 = 8 times 9 divided by two. So what's the next triangular number??
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 23 a triangle number?
No, 23 is not a triangular number. Here are a few examples of triangular numbers: 21, 28, 55, 45, 78 and 91.
Is 8 triangular number?
No. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, ...
Is 47 a triangular number?
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.
