Fiona had 28 more jelly beans than Opal. Fiona used
78 of her jelly beans and Opal used
12 of her jelly beans. In the end, Fiona had 2 times as much as Opal. Find the number of jelly beans that Opal had at first.
| |
Fiona |
Opal |
Comparing Fiona
and Parry at first |
28 more |
|
| Before |
8x2 =
16 u |
2 u |
| Change |
- 7x2 =
- 14 u |
- 1 u |
| After |
1x2 =
2 u |
1 u |
Comparing Fiona
and Parry in the end |
2 u |
1 u |
The number of jelly beans that Fiona had in the end is repeated. Make the number of jelly beans that Fiona had in the end the same. LCM of 1 and 2 is 2.
Number of jelly beans that Fiona had more than Opal
= 16 u - 2 u
= 14 u
14 u = 28
1 u = 28 ÷ 14 = 2
Number of jelly beans that Opal had at first
= 2 u
= 2 x 2
= 4
Answer(s): 4
