GMAT Quantitative Reasoning Practice Test 5

Question : 6 of 100

Marks: +1, -0

Heather has 35 stamps in her stamp collection. The stamps are divided into three groups: old, new and foreign. The number of stamps in the old group is one half of the number of stamps in the new group and one seventh of the total amount of stamps. How many foreign stamps does Heather have?

Validate

Solution:

If the number of old stamp is

1/7

of the total amount, then there are 5 old stamps. Five old stamps are

1/2

of the new ones so there are 10 new stamps, therefore there are

35 − 10 − 5 = 20

foreign stamps.

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