Modular Arithmetic
Everything on SkillVeris tagged Modular Arithmetic — collected across the glossary, study notes, blog, and cheat sheets.
5 resources across 1 library
Interview Questions(5)
How to Find the Day of the Week for Any Date
The day of the week for any date is found using odd-day arithmetic: count the total number of “odd days” (days beyond complete weeks) from a known reference da…
How to Find the Unit Digit of Large Powers
The unit digit of a^n is found by identifying the cyclicity of the base’s unit digit (a pattern that repeats every 1, 2, or 4 powers) and then computing n mod…
How to Solve Remainder Theorem Problems
Remainder theorem problems are solved by working entirely in modular arithmetic — reducing each factor or term to its remainder modulo the divisor before combi…
Divisibility Rules Every Candidate Should Know
Divisibility rules let you determine whether a number divides another exactly by inspecting a small, derived property of its digits — such as the last digit, d…
How to Find the Last Digit Using Cyclicity of Numbers
Cyclicity is the fact that the last digit of a^n repeats in a short, predictable pattern as n increases, so the last digit of any power can be found by reducin…