GMAT Quantitative Reasoning Practice Test 5

Question : 7 of 100

Marks: +1, -0

The numbers of pizza slices that are sold in Joey’s Pizza are only in quantities of 5 and 8 slices per customer. How many slices cannot be bought?

Solution:

Check every answer.

\;42=2 × 5+8 × 4 .

\;33=5 × 5+8 .

\;20=4 × 5 .

\;38=5 × 6+8 .

The only a number which cannot be bought is 22 .

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