A fruit stall had 6 times as many mangosteens as chikoos. After 20 chikoos were added, the number of mangosteens became twice the number of the chikoos. How many chikoos were there at the fruit stall at first?
| |
Mangosteens |
Chikoos |
| Before |
6x1 =
6 u |
1x1 =
1 u |
| Change |
|
+ 20 |
| After |
2x3 =
6 u |
1x3 =
3 u |
The number of mangosteens remains unchanged. Make the number of mangosteens the same. LCM of 2 and 6 is 6.
Number of chikoos added
= 3 u - 1 u
= 2 u
2 u = 20
1 u = 20 ÷ 2 = 10
Number of chikoos at the fruit stall at first
= 1 u
= 1 x 10
= 10
Answer(s): 10
