Mrs Teo baked 336 more puffs than Nora. After Mrs Teo sold 120 of her puffs, she had 4 times as many puffs as Nora.
- How many puffs did Nora bake?
- How many puffs did Mrs Teo bake?
| |
Nora |
Mrs Teo |
| Before |
1 u |
1 u + 336 |
| Change |
|
- 120 |
| After |
1 u |
1 u + 216 |
(a)
After
Number of puffs that Nora had = 1 u
Number of puffs that Mrs Teo had = 4 x 1 u = 4 u
Before
Number of puffs that Nora baked = 1 u
Number of puffs that Mrs Teo baked = 1 u + 336
4 u = 1 u + 336 - 120
4 u - 1 u = 216
3 u = 216
1 u = 216 ÷ 3 = 72
Number of puffs that Nora baked
= 1 u
= 72
(b)
Number of puffs that Mrs Teo baked
= 1 u + 336
= 72 + 336
= 408
Answer(s): (a) 72; (b) 408
