To solve this problem, we need to find the magic constant, which is the sum of each edge in the completed square. The formula to calculate the magic constant for a 3x3 magic square is (n^3 + n) / 2, where n is the number of cells on each side. In this case, n=3, so the magic constant is (3^3 + 3) / 2 = 15. By arranging the numbers 1-9 in the square such that each edge sums up to 15, we get the following arrangement:
8 1 6
3 5 7
4 9 2
-70
The numbers are: -2 and -20
64
77
-3
53
An aerator adds bubbles to flowing water, or oxygen to fish tanks.
Fibonacci sequence adds the previous two numbers to get the next number. 1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597
The two numbers are the same - the trailing zero adds no value to the number.
-13
No odd number (5) of odd numbers ever adds up to an even number (50).
Amicable numbers are two different numbers so related that the sum of the proper divisors of each is equal to the other number. For example, the smallest pair of amicable numbers is (220, 284)