Ian had
112 as many marbles as Tommy. Tommy had twice as many marbles as Vincent. If Ian had 225 marbles fewer than Vincent,
- how many marbles did Ian have?
- how many marbles did they have altogether?
(a)
Number of marbles that Ian had = 1 u
Number of marbles that Tommy had = 12 u
Number of marbles that Vincent had = 12 u ÷ 2 = 6 u
Number of marbles that Ian had fewer than Vincent
= 6 u - 1 u
= 5 u
5 u = 225
1 u = 225 ÷ 5 = 45
Number of marbles that Ian had
= 1 u
= 45
(b)
Total number of marbles that they had
= 1 u + 12 u + 6 u
= 19 u
= 19 x 45
= 855
Answer(s): (a) 45; (b) 855
