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The nth triangulat number is n*(n+1)/2

The 100th is 100*101/2 = 5050

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13y ago
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8y ago

The nth triangular number is n(n+1)/2

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Q: How do you find the 100th triangle number?
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Related questions

What is the 100th triangle number?

the answer is 5050


How many odd numbers are in the 100th row of Pascals triangle?

The number of odd numbers in the Nth row of Pascal's triangle is equal to 2^n, where n is the number of 1's in the binary form of the N. In this case, 100 in binary is 1100100, so there are 8 odd numbers in the 100th row of Pascal's triangle.


What is the 100th Fibonacci number?

The 100th Fibonacci number is 354,224,848,179,261,915,075.


What is the 100th pentagonal number?

The 100th pentagonal number is 14950.


What is the the 100th prime number?

The 100th prime number is 541.


Is 99 the 100th odd number?

No. As both negative and positive numbers can be odd, there is no first odd number, and therefore no 100th odd number. The 100th odd positive number is 199.


What does 10 to the 100th power equal?

10 to the 100th is... 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,00 .... 10 to the 100th is a googol, or a number with 100 zeroes after it.


What is the 100th number in the pattern 2 5 8 11?

The Nth number is (3N - 1), so the 100th number is 299 .


How do you find the hundredth odd number?

Simplify the problem. What is the fifth odd number. 1, 3, 5, 7, 9. 9 is the fifth odd number.Similarly for the 100th odd number. In the number 200, there is an equal count of even and odd.And since the first number is odd, then the number 199 is the 100th odd number.


How do you find the no of triangle in a figure?

It is: number of sides -2 = number of triangles


What is the 100th odd number?

199


What is the 100th number in Pi?

9