The graph shows the number of coins 3 students collected. Study the graph and answer the following.
- Who collected 42 coins? Give the answer in number. (Eg 1)
- Which 2 students collected a total of 72 coins? Give the answer in numbers. (Eg 1, 2)
- How many coins must Ruby give to Leah so that both of them would have the same number of coins?
(a)
6 coins → 1 circle
42 coins → 42 ÷ 6 = 7 circles
(2) Anna had 7 circles so she collected 42 coins.
(b)
Total number of circles represented by 72 coins
= 72 ÷ 6
= 12
Number of circles that Leah and Anna had
= 7 + 5
= 12
2 students who collected a total of 72 coins are (2) Anna and (3) Leah.
(c)
Difference in the number of circles between Ruby and Leah
= 6 - 5
= 1
Number of coins that Ruby must give to Leah
= 1 ÷ 2 x 6
= 3
Answer(s): (a) 2; (b) 2, 3; (c) 3