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(1+15)*15/2
first plus last times number of numbers then divide by two

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Q: What is the sum of the first 15 Numbers?
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Related questions

What is the sum of the first 15 prime numbers?

the sum of the first 15 prime numbers is 328 .


What is the sum of the first fifteen odd numbers?

The sum of the first 15 odd numbers is 225.


What is the sum of the first 5 numbers?

The sum of the first 5 numbers is 15. 1+2+3+4+5=15


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The sum of the first five whole numbers is 10.


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The sum of the first 15 positive even numbers is 240. (Simply square 15, then add 15 to the result: 15 x 15 = 225. 225 + 15 = 240).


What is the sum of the first 15 whole numbers?

The sum of the smallest 15 positive integers is 120. The sum of the smallest 15 negative integers is -120.


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What is the sum of the first 5 counting numbers?

1+1+1+1+1+=5 * * * * * The question did not ask for the sum of the first counting number five times! The sum of the first 5 counting numbers is 1+2+3+4+5 = 15. Such sums are known as triangular numbers.


What is the sum of three numbers that equal 15?

Oh, dude, you're hitting me with a math question? Alright, so if three numbers add up to 15, you could have 5, 5, and 5. Boom, 15! Or you could get all fancy and do like 4, 6, and 5. Still ends up being 15. Math, man, it's wild.


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The sum of the first 50 whole numbers is 1,225.


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