Guess and check used to be called trial and error. If you look at 645 and realize that 400 and 245 differ by 155, you know you're only four away. So you try 398 and 247 and there you are.
Let the two numbers be represented by 'a' and 'b'. Then, a + b = 645 And a - b = 151............adding these two eqations together gives :- 2a = 796 : a = 398..........and b = 645 - 398 = 247 (or b = 398 - 151 = 247).
445
The sum is 150*151/2 = 11,325
The mean of a single number, such as 151, is the number itself, since the mean is calculated by dividing the sum of a set of numbers by the count of those numbers. Therefore, the mean of 151 is 151.
Difference. A sum is the result of adding two numbers, and a difference is the result of subtracting two numbers.
645 - 151 = 494 494 / 2 = 247 247 + 151 = 398 Which means: 398 + 247 = 645 and 398 - 247 = 151
398 and 247.
247 + 398 = 645398 - 247 = 151Therefore the two numbers which add together to make 645 and have a difference of 151 are 247 and 398.
a + b = 645 a - b = 151 Add: 2a = 796 a= 398, making b = 247
Let the two numbers be represented by 'a' and 'b'. Then, a + b = 645 And a - b = 151............adding these two eqations together gives :- 2a = 796 : a = 398..........and b = 645 - 398 = 247 (or b = 398 - 151 = 247).
445
The sum is 150*151/2 = 11,325
The mean of a single number, such as 151, is the number itself, since the mean is calculated by dividing the sum of a set of numbers by the count of those numbers. Therefore, the mean of 151 is 151.
Sum means adding so the sum is 645 + 10 = 655. Hope it helped!
The difference of two numbers is 8. Their sum is 22. What are the two numbers?
Difference. A sum is the result of adding two numbers, and a difference is the result of subtracting two numbers.
Two numbers with a sum of 4 and a difference of 9 are -6.5 and 2.5.