The graph shows the number of erasers 3 pupils collected. Study the graph and answer the following.
- Who collected 42 erasers? Give the answer in number. (Eg 1)
- Which 2 pupils collected a total of 78 erasers? Give the answer in numbers. (Eg 1, 2)
- How many erasers must Riley give to Vina so that both of them would have the same number of erasers?
(a)
6 erasers → 1 triangle
42 erasers → 42 ÷ 6 = 7 triangles
(2) Ruby has 7 triangles so she collected 42 erasers.
(b)
Total number of triangles represented by 78 erasers
= 78 ÷ 6
= 13
Number of triangles that Ruby and Vina had
= 7 + 6
= 13
2 pupils who collected a total of 78 erasers are (2) Ruby and (3) Vina.
(c)
Difference in the number of triangles that Riley and Vina had
= 8 - 6
= 2
Number of erasers that Riley must give to Vina
= 2 ÷ 2 x 6
= 6
Answer(s): (a) 2; (b) 2, 3; (c) 6