小学校の宿題

Problem-Solving Strategy: Use Logical Thinking

On Monday, students saw 15 birds at the feeder. On other days they saw 12, 13, 19, and 20 birds. They saw fewer birds on Wednesday than on Monday. Friday they saw the most birds. How many birds did they see Thursday?

果たして答えが一意に定まらないことを発見させようとしているのか。

Maria jumps rope at recess. On Monday, she jumps for 8 minutes without missing. On Tuesday, she jumps 10 minutes without missing. On Wednesday, she jumps for 12 minutes. How many minutes might she jump on Thursday?

"Find a pattern"ということらしいが，これはあんまりだと思う。