Page 131 - NUMINO Challenge_B2

15 Calendars

Basic Concepts Calendars

There are 7 days in a week. Therefore, each day of the week comes once
every 7 days. 100 days from now, the day of the week will be two days later
because 100 7 14 r2. If today is a Monday, it will be a Wednesaday 100
days from now.

The calendar on the right is a dayless Days of the
calendar, a calendar with no days. Many Week
calendar or related problems can be solved
by writing the days in the dayless calendar
according to the conditions.

Example There are five Wednesdays in September. The 1st of September is
not a Wednesday. Find the date of the 2nd Sunday of September.

Class Notes

There are (28, 30, 31) days in September. Make a dayless calendar.

Based on the conditions that the 1st is not a Wednesday and there are five Wednesdays
this month, find the Wednesdays. Then complete the calendar.

September September

1234567 Tue Wed Thu Fri Sat Sun Mon
8 9 10 11 12 13 14
15 16 17 18 19 20 21 1234567
22 23 24 25 26 27 28 8 9 10 11 12 13 14
29 30 15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30

Therefore, the 2nd Sunday of September is the .

Try It Again Three Saturdays of a month are even numbers. What day is the
10th of this month?

128 NUMINO Challenge B2