Mary has some marbles. She has 3 less marbles in Box P than in Box Q. After 10 marbles were transferred from Box Q to Box P, there were 55 marbles in Box Q.
- How many marbles were there in Box Q at first?
- How many marbles were there in Box P in the end?
|
Box P |
Box Q |
Before |
1 u |
1 u + 3 |
Change |
+ 10 |
- 10 |
After |
1 u + 10 |
55 |
(a)
Number of marbles in Box Q at first
= 55 + 10
= 65
(b)
Number of marbles in Box P at first
= 65 - 3
= 62
Number of marbles in Box P in the end
= 62 + 10
= 72
Answer(s): (a) 65; (b) 72