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The two prime numbers that add up to 19 are 7 and 12. Prime numbers are numbers greater than 1 that can only be divided by 1 and themselves. In this case, 7 and 12 are not prime numbers, and there are no two prime numbers that add up to 19.
1+6 2+5 3+4
325
103
Four consecutive numbers adding up to ten are: 1+2+3+4
1+6 2+5 3+4
10
Sum of first n numbers = n/2(n +1) = 500 x 1001 = 500500
add all of them up and divide by amount of numbers eg 1 2 3 4 5 1+2+3+4+5 / 5
Think of an odd number as an even number with 1 left over. So if you add two even numbers that each have 1 left over, the left overs add up to 2. So it's two even numbers added together plus 2.
Mean refers to the average of a group of numbers. To find the mean, you add the numbers together and divide by the amount of numbers in the group. For instance, find the mean of 1, 2, 3 Add the numbers together. 1+2+3=6 3 numbers were in the original set of numbers so divide by 3 6/3=2 The mean is 2.
1+2+3+5+11+17+41 = 80
false none of the numbers add up to 31
A Fibonacci number is found by starting with 0, then adding 1=1, then add 1= 1+1=2, then add 1+2=3, then add 2+3=4, then add 4+3=7. If we keep it up we end up with 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ... . The Fibonacci numbers are found by starting with 0, adding 1, then adding the result to the integer immediately preceding the equals sign.
the way you get the mode is you add up the numbers and didvide it by 2
There is no answer to this. The factors of 15 are 1, 3, 5 and 15. The only numbers that add up to four are 1+3, 4+0 and 2+2.
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