Tag Archives: greatest common factor

The Difference Among LCM, LCD, GCD and GCF

LCM and LCD LCM means Least Common Multiple. Multiple in this context is used for integers. LCD, on the other hand, means Least Common Denominator. As we know, denominator is used in fractions. So, in 1/3 and 1/4, should we say, LCM or LCD? CORRECT STATEMENT: LCM of 3 and 4 (multiple is used for… Read More »

PCSR Civil Service Exam Review Guide 1

PCSR 2017 CIVIL SERVICE EXAM REVIEW GUIDE 1 Updated: April 25, 2017 PART I: MATHEMATICS A. GCD Videos Lesson 1: Understanding Common Divisors Lesson 2: Common Divisors and Greatest Common Divisor Lesson 3: Exercises on Getting the GCD Lesson 4: Getting the GCD by Prime Factorization Lesson 5: GCD and Reducing Fractions to Lowest Terms… Read More »

Greatest Common Factor Quiz

After learning How to Get the Greatest Common Factor of Two Numbers, let’s have a quiz! The greatest common factor is used to reduce a fraction to lowest terms, so I included such items on the quiz below. To reduce a fraction to lowest terms, get the greatest common factor of the numerator and the denominator, and… Read More »

How to Convert Percent to Fraction

In Civil Service Examinations, as well as other examinations in basic mathematics, knowing how to convert  percent, fractions, and decimals to each other is very advantageous especially if you can do it mentally. Let us try with the following example. A P640 shirt is marked 25% discount. How much will you have to pay for… Read More »

How to Get the Greatest Common Factor of Numbers

A tutorial on how to get the greatest common factor of two numbers. In this video, the concept of factors was briefly explained. A simple application of greatest common factor which is converting fractions to lowest terms was also illustrated. Errata: In example 2, 9 is also a factor of 45. In example 3, 2 is… Read More »

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