If the pattern below following the rule starting with 10 every consecutive line has a number 1 less than the previous line how many marbles must be in the seventh line?
If the pattern below following the rule starting with 10 every consecutive line has a number 1 less than the previous line how many marbles must be in the seventh line?
4
1
36
10
33
17 -Apex(((:
There must be 67 marbles.
22 marbles are in the fifth line.
33 marbles must be in the sixth line
36
17
The fifth line will have 19 marbles. 4 5 7 11 19
1
36
10
the answer is 4
18
18