Pamela has 13 pens fewer than Fiona but 40 pens more than Peter. The three children have 168 pens altogether.
- How many pens does Peter have?
- How many pens does Fiona have?
(a)
Number of pens Fiona has = 1 u
Number of pens Pamela has = 1 u - 13
Number of pens Peter has = 1 u - 13 - 40 = 1 u - 53
Total number of pens
= 1 u + 1 u - 13 + 1 u - 53
= 3 u - 66
3 u - 66 = 168
3 u = 168 + 66
3 u = 234
1 u = 234 ÷ 3 = 78
Number of pens that Peter has
= 1 u - 53
= 78 - 53
= 25
(b)
Number of pens that Fiona has
= 1 u
= 78
Answer(s): (a) 25; (b) 78
