Elyse has 2 times as many coins as Gem. Gem has
56 as many coins as Mary. If the three of them have a total of 252 coins, how many coins does Mary have?
Elyse |
Gem |
Mary |
2x5 |
1x5 |
|
|
5x1 |
6x1 |
10 u |
5 u |
6 u |
The number of coins that Gem has is repeated. Make the number of coins that Gem has the same. LCM of 1 and 5 is 5.
Total number of coins that the three of them have
= 10 u + 5 u + 6 u
= 21 u
21 u = 252
1 u = 252 ÷ 21 = 12
Number of coins that Mary has
= 6 u
= 6 x 12
= 72
Answer(s): 72