At first, Glen had 151 more yellow beads than green beads in a box. Each day, he took out 10 yellow beads and 2 green beads from the box. After some time, he only had 25 green beads left in the box.
- How many beads did Glen take out from the box altogether?
- How many green beads did Glen have at first?
| |
Yellow beads |
Green beads |
Comparing yellow beads
and green beads at first |
151 more |
|
| Before |
10 u |
2 u + 25 |
| Change |
- 10 u |
- 2 u |
| After |
0 |
25 |
(a)
If another 151 green beads are added into the box at first, the number of yellow and green beads will be the same.
10 u = 2 u + 25 + 151
10 u - 2 u = 25 + 151
8 u = 176
1 u = 176 ÷ 8 = 22
Number of beads that Glen took out
= 10 u + 2 u
= 12 u
= 12 x 22
= 264
(b)
Number of beads that Glen had at first
= 264 + 25
= 289
Answer(s): (a) 264; (b) 289
