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Calendar Problems - Intermediate-Advanced Level: month puzzles INTERMEDIATE-ADVANCED

Strategic expert challenge ★ for calendar problems: 20 intermediate-advanced-level problems. Worksheet 19 of 30 - Focus: month puzzles. Develop expertise in year logic, leap year calculations, calendar arithmetic with step-by-step solutions. Ideal for advanced developing learners targeting advanced concepts with increasing complexity.

📝 Worksheet 19 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate-advanced level

What you'll learn in this worksheet:
Your progress through Calendar Problems
Worksheet 19 of 30 (63% complete)

Question 1

How many odd days are there between 1 January 1999 and 1 January 2004 (excluding the start date)?
Years from 1999 to 2003 inclusive. Total days = 1826. Odd days = 1826 mod 7 = 6
odd-days, ssc, advanced

Question 2

Is 1943 a leap year?
1943 is not a leap year because it's not divisible by 4
leap-year, basic

Question 3

What day of the week was 31 December 1900 (the last day of the 19th century)?
31 December 1900 was a Monday. Note: Century years divisible by 400 are leap years, others are not.
century, last-day

Question 4

How many odd days are there from 01-01-2006 to 05-02-2011 (inclusive)? (Note: Odd days = remainder when total days are divided by 7)
Total days = 1862. Odd days = 1862 mod 7 = 0.
odd-days, ssc, railways

Question 5

Which century does the year 1878 belong to?
Year 1878 belongs to the 19th century (years 1801 to 1900)
century, complex

Question 6

If someone was born on 19 December 2003 (a Friday), what day of the week will their birthday be in 2020?
The birthday 19 December 2020 falls on a Saturday.
birthday, calculation

Question 7

What is the date of the 3rd Tuesday in December 2023?
The 3rd Tuesday of December 2023 falls on 19-12-2023.
nth, weekday, calendar

Question 8

How many even dates are there in January 2022?
January 2022 has 31 days, of which 15 are even dates
counting, basic

Question 9

How many odd days are there between 1 January 1985 and 1 January 2034 (excluding the start date)?
Years from 1985 to 2033 inclusive. Total days = 17897. Odd days = 17897 mod 7 = 5
odd-days, ssc, advanced

Question 10

What is the date of the last Tuesday in October 2026?
The Tuesdays in October 2026 fall on: 6, 13, 20, 27. The last one is 27.
nth-weekday, date-finding

Question 11

If the days of the week are coded as {'Monday': 'Zeta', 'Tuesday': 'Alpha', 'Wednesday': 'Gamma', 'Thursday': 'Delta', 'Friday': 'Theta', 'Saturday': 'Epsilon', 'Sunday': 'Omega'}, what is the code for Saturday?
Saturday is coded as Epsilon.
coding, decoding, bank

Question 12

Is 1977 a leap year?
1977 is not a leap year because it's not divisible by 4
leap-year, basic

Question 13

Which century does the year 2072 belong to?
Year 2072 belongs to the 21th century (years 2001 to 2100)
century, complex

Question 14

If January 1, 2008 was a Tuesday, what day was January 1, 2036?
January 1, 2036 was a Tuesday. Calendar patterns repeat in cycles due to leap years.
patterns, cycles

Question 15

A person was born on 3 January 2001. What is their age on 27 January 2026?
Born 3 January 2001, age on 27 January 2026 is 25 years
age, calculation

Question 16

What day of the week was 2 March 2046?
Using Zeller's congruence: 2/3/2046 = Friday
zeller, direct-calculation

Question 17

What day of the week was 31 December 1900 (the last day of the 19th century)?
31 December 1900 was a Monday. Note: Century years divisible by 400 are leap years, others are not.
century, last-day

Question 18

How many days are there between 26 March 2021 and 4 November 2021?
The difference between 26 March 2021 and 4 November 2021 is 223 days
difference, calculation

Question 19

Is 1957 a leap year?
1957 is not a leap year because it's not divisible by 4
leap-year, basic

Question 20

What day of the week was 18 February 2003?
Using calendar calculation, 18 February 2003 was a Tuesday.
basic, day-finding
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