The pattern starts with 2 marbles. Each subsequent line follows the rule of having a number that is one less than twice the previous line. Thus, the sequence is as follows:
1st line: 2
2nd line: 2 * 2 - 1 = 3
3rd line: 2 * 3 - 1 = 5
4th line: 2 * 5 - 1 = 9
5th line: 2 * 9 - 1 = 17
Therefore, there are 17 marbles in the fifth line.
18
the answer is 4
There must be 67 marbles.
If the pattern starts with five marbles on the first line and each consecutive line has one more marble than the previous line, the number of marbles on each line would be as follows: 5 (first line), 6 (second line), 7 (third line), 8 (fourth line), 9 (fifth line), 10 (sixth line), and 11 (seventh line). Therefore, the seventh line will have 11 marbles.
17
1
18
36
10
the answer is 4
36
9
18
33
17 -Apex(((:
There must be 67 marbles.
11