Betty, Cathy and Gwen were playing with beads. Betty started with 40 beads and in the first game, she won
45 more beads from Cathy. In the second game, Betty lost
58 of her original number of beads to Gwen. Cathy lost as many beads as Betty to Gwen. In the final game, Betty won
12 of her original number of beads from Cathy. All of them ended up with the same number of beads.
- How many beads did Betty have in the end?
- How many beads did Cathy have at first?
|
Betty |
Cathy |
Gwen |
Before |
40 |
|
|
First game |
+ 32 |
- 32 |
|
Second game |
- 25 |
|
+ 25 |
|
|
- 25 |
+ 25 |
Final game |
+ 20 |
- 20 |
|
After |
1 u |
1 u |
1 u |
(a)
Number of beads that Betty won from Cathy
=
45 x 40
= 32
Number of beads that Betty lost to Gwen
=
58 x 40
= 25
Number of beads that Betty won from Cathy
=
12 x 40
= 20
Number of beads that Betty had in the end
= 40 + 32 - 25 + 20
= 67
(b)
Number of beads that Cathy had at first
= 1 u + 20 + 25 + 32
= 67 + 20 + 25 + 32
= 144
Answer(s): (a) 67 ; (b) 144