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Wendy Root

##
Weekly Math Challenge - week of 4/13/20

**Grades:**
5th Grade

**Subjects:**
Math

**Student Instructions**

**Teacher Notes (not visible to students)**

SOLUTIONS:
Slide 1: 22
In 12 hours, the hour hand makes one full circle, while the minute hand makes 12 full circles.
If an observer "sits" on the hour hand, he'll see that the hour hand does not move (with respect to him), while
the minute hand makes 12 – 1 = 11 full circles (and the clock itself makes one circle in the backwards
direction). While making each of these 11 circles, the minute hand makes right angle with the hour hand
twice. So the answer is 2 × 11 = 22.
Slide 2: area = 24 square inches