Mr Perry shares 21 biscuits between 2 people (but not an equal share) . . . he shares them at a ratio of 1:6 . . . which means for every 1 handed out to the first person, the second person gets 6 (for a total of 1 + 6 = 7 biscuits handed out in the first round) . . . divide 21 by 7 to determine there are 3 rounds of sharing . . .
(21 biscuits)/(7 biscuits per round) = 3 rounds of sharing
Multiply rounds of sharing by ratio of sharing:
3:3 * 1:6 = 3:18
Check by adding up the total:
3 + 18 = 21
so . . .
Mr. Perry . . . 21/(1 + 6) = 3 . . . 1*3 = 3 . . . 6*3 = 18
Person A gets 3 biscuits
Person B gets 18 biscuits
Do the same procedure for the others to get . . .
Mr. Castle . . . 64/(1 + 7) = 8 . . . 1*8 = 8 . . . 7*8 = 56
Person A gets 8 marbles
Person B gets 56 marbles
Mr. Adams . . . 14/(3 + 4) = 2 . . . 3*2 = 6 . . . 4*2 = 8
Person A gets 6 pencils
Person B gets 8 pencils
