Mary had 10 more biscuits than Kimberly at first. After Mary ate 6 biscuits, she had five times as many biscuits as Kimberly in the end. How many biscuits did Kimberly have?
| |
Kimberly |
Mary |
| Before |
1 u |
1 u + 10 |
| Change |
|
- 6 |
| After |
1 u |
1 u + 4 |
Comparing Kimberly
and Mary in the end |
1 u |
5 u |
The number of biscuits that Kimberly had remains unchanged.
Number of biscuits that Mary had in the end
= 5 x 1 u
= 5 u
5 u = 1 u + 4
5 u - 1 u = 4
4 u = 4
1 u = 4 ÷ 4 = 1
Number of biscuits that Kimberly had
= 1 u
= 1
Answer(s): 1
