Tommy had
16 as many pens as Ian. Ian had twice as many pens as Reggie. If Tommy had 100 pens fewer than Reggie,
- how many pens did Tommy have?
- how many pens did they have altogether?
(a)
Number of pens that Tommy had = 1 u
Number of pens that Ian had = 6 u
Number of pens that Reggie had = 6 u ÷ 2 = 3 u
Number of pens that Tommy had fewer than Reggie
= 3 u - 1 u
= 2 u
2 u = 100
1 u = 100 ÷ 2 = 50
Number of pens that Tommy had
= 1 u
= 50
(b)
Total number of pens that they had
= 1 u + 6 u + 3 u
= 10 u
= 10 x 50
= 500
Answer(s): (a) 50; (b) 500
