Farid has 28 toy cars and Rina has 42 toy cars. They each make gift bags, using all their toy cars, and they make the same number of bags. What is the greatest number of bags each of them can make?
- 2 bags
- 7 bags
- 14 bags
- 42 bags
Need a hint?
List the factors of 28 and the factors of 42, then choose the largest factor common to both.
Worked answer
- The common factors of 28 and 42 are 1, 2, 7 and 14.
- The greatest common factor is 14.
- Each of them can make 14 gift bags.
Answer: 14 bags
The mistake this question tests
Habit
Factors and multiples (HCF, LCM)
Choosing 7 bags means finding a common factor but not the greatest common factor.
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