Sign In
Ask Question
Ruffles
Mathematics
17 May, 16:54
Find the gcd and lcm of 20 and 56
+5
Answers (
1
)
Rylan Hall
17 May, 17:19
0
By gcd, I think you mean gcf (Greatest Common Factor).
To find the gcf find all the factors of each number:
Factors of 20: 1, 2, 4,5,10, 20
Factors of 56: 1, 2, 4, 7, 8, 14, 28, 56
The largest common factor is 4.
LCM = Least Common Multiple
This is the smallest number that both numbers divide into evenly
Find the prime factors of each number:
Prime factors of 20: 2 * 2 * 5
Prime factors of 56: 2 * 2 * 2 * 7
To find the LCM, multiply all prime factors the most number of times they occur.
In the prime factor of 56, 2 appears 3 times and 7 appears once.
In the prime factor of 20 5 appears once.
LCM = 2 * 2 * 2 * 7 * 5 = 280
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“Find the gcd and lcm of 20 and 56 ...”
in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
What is the completely factored form of d4 - 8d2 + 16?. A) (d2 + 4) (d2 - 4). B) (d2 - 4) (d2 - 4). C) (d2 + 4) (d + 2) (d - 2). D) (d + 2) (d - 2) (d + 2) (d - 2)
Answers (1)
Write the equation of a line in slope - intercept form if the slope is 1/5 and the y - intercept is - 9
Answers (1)
Find an equation of the line that has a slope of - 8 and y-intercept of 6. Write the answer in the form Y = Mx+B y = ?
Answers (2)
I have a few questions: 1. Jean runs 3.5 miles per week while Janell runs 13.3 miles per week. Janell runs how many times the number of miles that Jean runs? 2. Cora is saving for college. The first year of tuition is $7,485.00.
Answers (1)
What is a type of expression that contains a variable or variables
Answers (1)
New Questions in Mathematics
What is 17x*14x-10+24?
Answers (1)
B. Six packages had weights of 2 lb, 5 lb, 7 lb, 5 lb, 9 lb, and 8 lb. What's the average weight of the packages?
Answers (1)
What is the meaning of zero in integers?
Answers (1)
Divide 6⁄13 by 6⁄12. A. 9⁄16 B. 13⁄12 C. 1⁄12 D. 12⁄13
Answers (2)
if Dion drove to Phoenix at a rate of 60 miles per hour and the return trip he drove 50 miles per hour and it took him one am hour longer on the return trip, how far does he live from Phoenix?
Answers (1)
Home
»
Mathematics
» Find the gcd and lcm of 20 and 56
Sign In
Sign Up
Forgot Password?