if its in a triangle shape its easy as follows
1
6 9
7 5
3 8 4 2
-70
The numbers are: -2 and -20
64
77
624
-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
67
The two numbers are the same - the trailing zero adds no value to the number.
-13