# Greatest common divisor (GCD) - practice problems

Direction: Solve each problem carefully and show your solution in each item.#### Number of problems found: 127

- Common divisors

Find all common divisors of numbers 30 and 45. - Decompose 3076

Decompose into primes and find the greatest divisor of the pair of numbers D (84.70). - Greatest common factor

What is the GCF of 8 and 20? - Reduce ratio

Express the following ratio in simplest form: 30:42 - Simplest form 3

What fraction is 15 of 35 in simplest form? - 6/24 change

6/24 chance to a fraction in the lowest terms - Seven numbers

Write seven 4-digit numbers divisible by three and at the same time by 4. - Simple form

Given ratio 45: 90 = Write the ratio in a Simple form - Lcm and hcf

If the LCM of a and 18 is 36 and the HCF of a and 18 is 2, then a = … - Difference 15263

Calculate the difference between the greatest common divisor and the least common multiple of 24 and 36. - The GCF

The GCF of 40 and a number is 8. what is the number if it lies between 70 and 80? - Length of a string

What are the smallest string length we can cut into 18 equal parts and even 27 equal parts (in decimeters)? - LCD 2

The least common denominator of 2/5, 1/2, and 3/4 - Decompose

Decompose into primes and find the smallest common multiple n of (16,20) and the largest common divisor D of the pair of numbers (140,100) - Bicycle wheels

The driving wheel of a bicycle has 54 teeth. The driven wheel has 22 teeth. After how many revolutions will meet the same teeth? - Determines 80517

Determines all two-digit numbers that have a greatest common divisor of 19 with the number 76 - Reminder and quotient

There are given the number C = 281, D = 201. Find the highest natural number S so that the C:S and D:S are with the remainder of 1. - Times 7822

How often is D (24.60) less than n (24.60)? - Gcd and lcm

Calculate the greatest common divisor and the least common multiple of numbers. a) 16 and 18 b) 24 and 22 c) 45 and 60 d) 36 and 30 - Two-digit 68654

List all compound positive two-digit numbers whose greatest common divisor with the number 51 is the number 17.

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