The logic follows here is: In an ordinary year, there are 365 days and on dividing 365 by 7, we get remainder = 1 so this extra one day is taken as an odd day. Similarly, in a leap year, there are 366 days and on dividing 366 by 7, we get remainder = 2 so these extra days are taken as the odd days. Thus, the remainder, which we get after dividing the number of days by 7 is considered as odd days. Number of odd days from 2014 to 2015 = 1 = 1 odd days Number of odd days from 2015 to 2016 = 1 = 1 odd days Number of odd days from 2016 to 2017 = 2 = 2 odd days Number of odd days from 2017 to 2018 = 1 = 1 odd days Number of odd days from 2018 to 2019 = 1 = 1 odd days Number of odd days from 2019 to 2020 = 1 = 1 odd days Number of odd days from 2020 to 2021 = 2 = 2 odd days Number of odd days from 2021 to 2022 = 1 = 1 odd days Number of odd days from 2022 to 2023 = 1 = 1 odd days Number of odd days from 2023 to 2024 = 1 = 1 odd days Number of odd days from 2024 to 2025 = 2 = 2 odd days Thus the total number of odd days = (1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2) = 14 odd days. Here, we have considered 14 odd days and not 7 because with 7 odd days the answer is a leap year but the given year is a non-leap year. So, a leap year cannot be the correct answer. Hence, the Calendar of 2014 is similar to that of 2025. Shortcut Trick +---------------+------------------------+ | Year | Repetition after years | +---------------+------------------------+ | Leap year | 28 | | Leap year + 1 | 6 | | Leap year + 2 | 11 | | Leap year + 3 | 11 | +---------------+------------------------+ Related Concepts: Year - One year has 365 days or 366 days on this basis the year is divided into two parts: • Normal year - It has 365 days. • Leap year - It has 366 days and completely divisible by 4. Century leap year - The year which is exactly divisible by 400. Example - 1200, 1600, 2000 etc. Counting of Odd days Ordinary Year: 365 days (52 weeks + 1 days) = 1 Odd days Leap Year: 366 days (52 weeks + 2 days) = 2 Odd days