Question

If the pattern below follows the rule starting with five every consecutive line has a number that is four less than twice the previous line how many marbles must be in the sixth line

Answer 1

The answer is 36

Explanation:

Answer 2

The rule starting with five. 5 marbles in first line.

Every consecutive line has a number that is four less than twice the previous line.

marbles in second line = 2(marbles in first line) - 4

So the number of marbles in second line = 2(5) -4 = 10-4 = 6

marbles in third line = 2(marbles in second line) - 4

So the number of marbles in second line = 2(6) -4 = 12-4 = 8

marbles in fourth line = 2(marbles in third line) - 4

So the number of marbles in fourth line = 2(8) -4 = 16-4 = 12

marbles in fifth line = 2(marbles in fourth line) - 4

So the number of marbles in fifth line = 2(12) -4 = 24-4 = 20

marbles in sixth line = 2(marbles in fifth line) - 4

So the number of marbles in sixth line = 2(20) -4 = 40-4 = 36

36 marbles must be in the sixth line.