Unit 2 · Schedule and Timetable Matching
Magic School Timetable — How Many Wand Classes?
Lesson 10 of 12
About this lesson
A magic school has a 4-day timetable with 3 classes per day. Wands are needed for spells, charms, and herbs only. This week, Wednesday is cancelled. How many wand-required classes remain? This question layers two filters: first identify which class names need a wand, then remove an entire day's worth of classes before counting.
Chapters
Question
In a school for young magicians, the weekly timetable is the following:
| Monday | Tuesday | Wednesday | Thursday | |
|---|---|---|---|---|
| 9:00–10:00 | stars & sky | potions & poisons | spells | herbs |
| 10:00–11:00 | farsight | herbs | broom flight | stars & sky |
| 11:00–12:00 | spells | charms | farsight | broom flight |
The young magicians need their magic wand for three classes: spells, charms, and herbs. There are no classes on Fridays.
This week, the classes on Wednesday are cancelled due to a competition.
For how many classes do the young magicians need their wands this week?
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