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2+4+6+8+10+12+14+16+18+20+22+24+26+28+30=240
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What is the sum of the first 15 positive even numbers?
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 5 numbers?
The sum of the first 5 numbers is 15. 1+2+3+4+5=15
Write a c program to find the sum of the first 15 even numbers and calculate the square of the sum?
#include<stdio.h> #include<conio.h> void main() { int c=1,i; unsigned int s=0; clrscr(); for(i=1,(i<=15;i++)) { if(i%2==0) { s=s+i; c=c+i; } } printf("/n sum of the first 15 even numbers is%d",s); printf("/n square of the sum is: %d",(s*s)); getch(); }
Which pair of numbers has an odd product and an even sum 6 9 12 15?
Must be the 2 odd numbers, 9 & 15 (P = 135, S = 24)
The sum of two numbers is 15 and the sum of their squares is 117 what are the two numbers?
The two numbers are 6 and 9
What is the sum of the first 15 positive even numbers?
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 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
What is the sum of the first five whole numbers?
The sum of the first five whole numbers is 10.
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.
Write a c program to find the sum of the first 15 even numbers and calculate the square of the sum?
#include<stdio.h> #include<conio.h> void main() { int c=1,i; unsigned int s=0; clrscr(); for(i=1,(i<=15;i++)) { if(i%2==0) { s=s+i; c=c+i; } } printf("/n sum of the first 15 even numbers is%d",s); printf("/n square of the sum is: %d",(s*s)); getch(); }
How many ways are there to add four positive even numbers to get a sum of twentyfour?
15
What is the sum of the first 15 Numbers?
(1+15)*15/2first plus last times number of numbers then divide by two
How. to. write an. algorthim. to find the. sum of. first. 15 natural. numbers?
Write an. Algorthim. To. Find the. Sum. Of. First15 natural. Numbers
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.
The sum of all numbers from 8 to 18 is an even number?
If you include 8 and 18 that is 11 numbers and their sum is 143 which is odd ---- Explanations (by the way, it is really not all the numbers between 8 and 18, it is just all the integers. There is an infinite number of numbers between 8 and 18, think of just 8, 8.1, 8.11, 8.111, 8.1111 etc) Here are some other fun ways to do this: One way to do it, of course is just to add 8+ 9 10 11 12 13 14 15 16 17 18 Before you add them all, consider just adding the last column, and looking at the ones column of that number. 8+9+0+1+2+....+8 that number is 53 so the sum is odd. If that numbers is even then the number is even OR Looking at just the odd numbers. The sum of even numbers is always even. An odd number and an even number is an odd number. So if the sum of the odd numbers is even then the last column will be an odd number and the total sum will be odd. The sum of odd numbers is even when there is an even number of them. Look at 2 odd numbers. (ie 3+3 =6, this is two odd numbers and their sum is even) 9,11,13,15,17 are even and there are 5 of them. This is an odd number of odd so the sum is odd. Now we know the sum of the odds and the evens is odd so the total of the last column must be odd and therefore the sum is odd. Another way is to see that the sum of the first n numbers is n(n+1)/2 We can add the sum of the first 18 numbers then subtract the sum of the first 7 numbers and what is left is the sum of the numbers 8 to 18. So in this case we have 18x19/2-8x9/2 which is (18x19-7x8)/2 this simplifies by first dividing the 18 and the 8 by 2 so we have 9x19-4x7= 171-28=143 OR What if we match up and add the 8 and the 18, the 9 and the 17, the 10 and the 16, the 11 and the 15, the 12 and the 14 and you have 13 left. This is the idea behind the formula for the first n numbers. That is 26x5+13=143
