2018 Gauss Contests - University of Waterloo

2018 Gauss Contest Solutions Page 3 Grade 7 1.Since 21 13 = 8, the number that should be subtracted from 21 to give 8 is 13. Answer: (B) 2.Reading from the pie chart, 20% of 100 students chose banana. Since 20% of 100 is 20, then 20 students chose banana. Answer: (D) 3.There are 30 minutes between 8:30 a.m. and 9:00 a.m.

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