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The sum of the first n positive integers (i.e. 1+2+3+...+n) is given by n(n+1)/2

so the sum of the first 25 positive integers is 1+2+3+...+25 = 25x26/2 = 325.

The sum of the first 25 EVEN numbers will be double this i.e. 2+4+6+...+50 = 650.

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โˆ™ 2010-02-13 13:09:20
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Q: What is the sum of the first 25 even numbers?
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Related questions

What will be the sum of first 25 even numbers?

There are 12 even numbers between 2 and 24 inclusive.The sum is 154.


What will be the sum of the first 25 prime numbers?

The sum of the first 25 prime numbers is 1,060.


What is the sum of the digits of the first 25 even counting numbers?

155


There are 25 prime numbers less than 100 is their sum even or odd?

The sum of the 25 primes less than 100 is even (it is 1060).The first prime number is 2. Every other prime number is odd.So, of the 25 primes less than 100, one is even and 24 are odd.Any two odd numbers sum to an even number. Therefore, an even number of odd numbers has an even sum. So the sum of 24 odd numbers is even.Therefore, the sum of the 25 primes less than 100 is even.


Sum of 1st 25 prime no?

The sum of the first 25 prime numbers is 1,060.


What is the sum of the first 25 odd numbers?

625


What is the sum of the first 25 multiples of 12?

The sum of the first 25 numbers is 25*26/2 = 325 So the sum of the first 25 multiples of 12 is 325*12 = 3900


How do you figure out the sum of the first 25 odd numbers without doing 1 3 5 and so on?

The sum of the first n odd numbers is n squared. 25 x 25 = 625


What is the difference between the sum of all even numbers and odd numbers from 25 to 100?

The sum of the even numbers is (26 + 28 + ... + 100); The sum of the odd numbers is (25 + 27 + ... + 99) Their difference is: (26 + 28 + ... + 100) - (25 + 27 + ... + 99) = (26 - 25) + (28 - 27) + ... + (100 - 99) = 1 + 1 + ... + 1 There are (100 - 26) ÷ 2 + 1 = 38 terms above which are all 1; their sum is 38 x 1 = 38. So the difference of the sum of all even numbers and all odd numbers 25-100 is 38.


How do you get the sum of the first 25 numbers by a means other than adding?

By using the formula for an arithmetic series. This is basically obtained by reasoning: The sum of the first 25 numbers is the same as 25 multiplied by the average of those numbers; the average in this case is simply (1 + 25) / 2.


How many 2-digit even numbers have an odd number as the sum of their digits?

25 of them


The sum of 2 numbers is 25 and their product is 156 What are the numbers?

If the sum of 2 numbers is 25 and their product is 156, the numbers are 12 and 13.


The sum of 2 numbers is 25 and their product is 156 What are the numbers-?

If the sum of 2 numbers is 25 and their product is 156, the 2 numbers would be 12 and 13.


Explain how you would find the sum of the first 50 even numbers?

1 and 50 = 51 2 and 49 = 51 3 and 48 = 51 etc There are 25 such pairs, each adding to 51. So the sum is 25*51 = 1275


What are the two prime numbers that sum 25?

23 + 2 = 25


The sum of two consecutive positive even numbers is 52 What is the smaller number?

There is no solution. You could do it if the numbers were odd: 25 and 27 are consecutive odd numbers that equal 52.


What is the Sum for the first 5000 odd numbers?

The sum of the first 5,000 odd numbers is 25,000,000 (25 million). This is an easy calculation. Simply square the number of integers you are looking to calculate. In this case 5,000 squared = 5,000 x 5,000 = 25 million.


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


What is the sum of the first 5 positive odd numbers?

1+3+5+7+9=25


Sum of first 5 odd numbers?

1+3+5+7+9 = 25


What is the sum of the squares or the first 5 prime numbers?

It is: 4+9+25+49+121 = 208


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

325


What is the sum of the numbers from 1 to 50?

Sum of first n integers = n/2(n+1), in this case 25 x 51 = 1275


Two numbers have a sum of 25 and a product of 154 what are the numbers?

14 and 11


The sum of two numbers is 54 and the difference is 4 What are the numbers?

25 and 29