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Best Answer

1+2=3

1+2+3=6

1+2+3+4=10

1+2+3+4+5=15

1+2+3+4+5+6=21

...etc...

1+2+......+24+25=325.

Another approach is:

Sum=(25+1)*25/2=325.

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Q: What is the sum of the number 1 through 25?
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Related questions

How do you get the sum of the first 25 natural number?

(1 + 25) x 25/2 ie 425. The sum of the first n integers is (n + 1) x n/2


Without adding find the sum of the whole numbers from 1 through 25?

(1+25)times25 then divided in half.13 times 25=325


Is 25 a abundant number?

Yes, 25 is an abundant number because the sum of its proper divisors (1, 5) is greater than the number itself (25 < 6).


What is the sum of all numbers from 1 to 25?

The sum of all integers between 1 and 25 is equal to (25 x (25 - 1))/2 = 325.


If you add the integers from 1 through 50 what sum do you get?

I still remember my brother taught me this simple math.... First, add 1 with the last number. So, 50 + 1 = 51 Then divide the last number with 2. So, 50/2 = 25 So, 51 X 25 = 1275 Asraf


What is the sum of 1 through 250?

The sum of 1 through 250 is 31,375.


What is the sum of all numbers from 1 to 25 including in between?

There is a formula to calculate this sum. It is, S = ½n(n + 1) In this question, n = 25 so the sum of the numbers from 1-25 is, ½ x 25 x 26 = 325


Find the sum of the counting numbers from 1 to 25?

Sum of 1,2, ... , n is n*(n+1)/2 Here, n = 25 so sum = 25*26/2 = 325


A spinner has the numbers 10 20 30 40 and a number cube numbered 1 through 6 what is the probability of getting a sum greater than 25?

Pr(Sum > 25) = Pr(Spinner = 30 or 40 and Cube = 6) = Pr(Spinner = 30 or 40)*Pr(Cube = 6) = 2/4 * 1/6 = 1/2*1/6 = 1/12 or 8.33... %


What is more than 25?

-- The sum of 25 and any positive number. -- The difference of 25 and any negative number. -- The product of 25 and any positive number greater than '1'. -- The ratio of 25 to any positive number less than '1'. -- 25 raised to any positive power greater than '1'. -- 25 raised to any negative power less than '1'. -- The factorial of any number greater than 5.


How many prime number in 1 through 100?

25


What is the sum of all the common factors of 25 and 80?

To find the common factors of 25 and 80, we first determine the factors of each number. The factors of 25 are 1, 5, and 25, while the factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80. The common factors shared by both numbers are 1 and 5. To find the sum of these common factors, we add them together: 1 + 5 = 6. Therefore, the sum of all the common factors of 25 and 80 is 6.