18
-13
Add up all the numbers and divide that total by the number of numbers. 1+ 2 + 3 + 4 + 5 = 15 15/5 = 3 The average is 3
27
26
2 numbers that add up to 8
15
The two numbers that multiply to -15 and add up to 2 are 5 and -3. When you multiply 5 and -3, you get -15, and when you add them together, you get 2.
45
The numbers are: 12 and -15
Three numbers that add up to 15 are 5, 5, and 5. Another combination could be 7, 5, and 3. Additionally, 10, 4, and 1 also sum to 15.
They all relate by adding up the 6+6+3=15 You can not get to the sum of 15 is you don't have the first 3 numbers to add up.
-13
Add up all the numbers and divide that total by the number of numbers. 1+ 2 + 3 + 4 + 5 = 15 15/5 = 3 The average is 3
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.
-15
Well, darling, the numbers you're looking for are 3 and 5. They multiply to 15 and add up to 8, not 4. Looks like you need to check your math before coming to me with these brain teasers.
1+2+3+4+5