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Yes, 55 is a triangular number.

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9y ago

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Related Questions

What is the tenth triangular number?

The tenth triangular number is equal to (10 x 11) / 2 = 55.


What are facts about the number 55?

55 is the largest triangular number in the Fibonacci sequence. 55 is a popular speed limit 55 is a odd


How can sixth triangular number be 21?

Because it is ! The first 10 triangular numbers are... 1,3,6,10,15,21,28,36,45 & 55


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 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.


What triangular number has 4 factors?

6, 10, 15, 21, 55, 91...


Can you tell the tenth triangular number?

Yes, it is 10*11/2 = 55.


Is sixty a triangular number?

Yes, sixty is a triangular number. Triangular numbers are those that can form an equilateral triangle, and they follow the formula ( T_n = \frac{n(n+1)}{2} ). For ( n = 10 ), ( T_{10} = \frac{10 \times 11}{2} = 55 ) and for ( n = 11 ), ( T_{11} = \frac{11 \times 12}{2} = 66 ). Therefore, sixty is not a triangular number, as it falls between the triangular numbers 55 and 66.


Is 63 a Triangular Number?

Is 63 a triangular number I think it is a triangular number.


What is a number that is a triangular number and a triangular number?

013


When you add two triangular numbers why do they equal to 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.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.


Is 100 a triangular number?

no it is not a triangular number