I have 13 marbles, Tom has twice as many and Bill has twice the number that Tom has. How many marbles do we have between the three of us?

Question

Thank you

Answer 1

i have 13 marbles
tom has 13 x 2 = 26 marbles
bill has 26 x 2 = 52 marbles
hence 3 of us have 13+26+52 = 91 marbles

Answer 2

if there are 48 matches in a box how many will there be in 6 boxes