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Calendar Reasoning - Intermediate Level: date arithmetic INTERMEDIATE

Comprehensive weakness targeting worksheet covering 20 intermediate-level calendar reasoning problems. Worksheet 18 of 30 emphasizes date arithmetic. Master leap year logic, month patterns, weekday determination through detailed explanations. Difficulty: moderate complexity with mixed patterns. Tailored for mid-level preparation.

📝 Worksheet 18 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate level

What you'll learn in this worksheet:
Your progress through Calendar Reasoning
Worksheet 18 of 30 (60% complete)

Question 1

In the calendar for Oct 2021, if the 1st falls on a Friday, on which weekday will the 15th fall?
15th is 14 days later: (4+14)%7=4, so Friday.
grid, position

Question 2

If 26-02-2021 is a Friday, what day is 12-03-2021?
14 days later: day shifts by 0 days. Friday + 0 days = Friday.
chain, multi-step

Question 3

If the day after tomorrow is not Wednesday, which day CANNOT be today?
If today were Monday, then day after tomorrow would be Wednesday, which contradicts the condition.
conditional, logic

Question 4

How many days did February have in the year 2018?
Year 2018 had 28 days in February.
leap-year, month

Question 5

In the following calendar grid for January 2022, how many Sundays are there? Mon Tue Wed Thu Fri Sat Sun | | | | | 1 | 2 3 | 4 | 5 | 6 | 7 | 8 | 9 10 | 11 | 12 | 13 | 14 | 15 | 16 17 | 18 | 19 | 20 | 21 | 22 | 23 24 | 25 | 26 | 27 | 28 | 29 | 30
In January 2022, Sundays fall on: 2, 9, 16, 23, 30. Total: 5.
grid, visual

Question 6

How many odd days are there in 28 years starting from 1811? (Note: Odd days = remainder when total days are divided by 7)
Total days = 21×365 + 7×366 = 10227 days. Odd days = 10227 mod 7 = 0.
odd-days, span

Question 7

A code says: 27/5 = Tuesday. What does 27/6 equal? (Use same year)
Next month same date: calculated day_name(27,6,2025)=Friday.
pair, month

Question 8

In the following calendar grid for September 2024, how many Thursdays are there? Mon Tue Wed Thu Fri Sat Sun | | | | | | 1 2 | 3 | 4 | 5 | 6 | 7 | 8 9 | 10 | 11 | 12 | 13 | 14 | 15 16 | 17 | 18 | 19 | 20 | 21 | 22 23 | 24 | 25 | 26 | 27 | 28 | 29
In September 2024, Thursdays fall on: 5, 12, 19, 26. Total: 4.
grid, visual

Question 9

In the following calendar grid for June 2020, how many Thursdays are there? Mon Tue Wed Thu Fri Sat Sun 1 | 2 | 3 | 4 | 5 | 6 | 7 8 | 9 | 10 | 11 | 12 | 13 | 14 15 | 16 | 17 | 18 | 19 | 20 | 21 22 | 23 | 24 | 25 | 26 | 27 | 28 29 | 30 | | | | |
In June 2020, Thursdays fall on: 4, 11, 18, 25. Total: 4.
grid, visual

Question 10

If today is Wednesday and yesterday was Tuesday, what day is tomorrow?
Using day relationships: If today is Wednesday and yesterday was Tuesday, = tomorrow? Thursday
weekday, sequence

Question 11

If today is Tuesday and yesterday was Monday, what day is tomorrow?
Using day relationships: If today is Tuesday and yesterday was Monday, = tomorrow? Wednesday
weekday, sequence

Question 12

In the following calendar grid for July 2027, how many Wednesdays are there? Mon Tue Wed Thu Fri Sat Sun | | | 1 | 2 | 3 | 4 5 | 6 | 7 | 8 | 9 | 10 | 11 12 | 13 | 14 | 15 | 16 | 17 | 18 19 | 20 | 21 | 22 | 23 | 24 | 25
In July 2027, Wednesdays fall on: 7, 14, 21. Total: 3.
grid, visual

Question 13

How many days did February have in the year 2012?
Year 2012 had 29 days in February.
leap-year, month

Question 14

In the calendar for Sep 2022, if the 1st falls on a Thursday, on which weekday will the 15th fall?
15th is 14 days later: (3+14)%7=3, so Thursday.
grid, position

Question 15

A code says: 4/11 = Tuesday. What does 4/12 equal? (Use same year)
Next month same date: calculated day_name(4,12,2025)=Thursday.
pair, month

Question 16

If tomorrow is not Saturday, which day CANNOT be today?
If today were Friday, then tomorrow would be Saturday, which contradicts the condition.
conditional, logic

Question 17

In 2043, on which date does Easter Sunday fall?
Easter Sunday in 2043 falls on March 29.
festival, holiday

Question 18

After how many years will the calendar for 1991 repeat exactly?
The calendar for 1991 repeats after 11 years because the day pattern and leap year cycle align.
calendar-cycle, repeat

Question 19

In the calendar for Aug 2025, if the 1st falls on a Friday, on which weekday will the 15th fall?
15th is 14 days later: (4+14)%7=4, so Friday.
grid, position

Question 20

In 2047, on which date does Easter Sunday fall?
Easter Sunday in 2047 falls on April 14.
festival, holiday
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