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Chapter 4- GCF & LCM
Test Description: Review GCF and LCM...
Instructions: Answer all questions to get your test result.
1) What do the letters GCF stand for?
A
Greatest Counting Factor
B
Greatest Common Fraction
C
Greatest Common Factor
D
Greatest Counting Fraction
2) When simplifying fractions, what is the benefit of finding the GCF to break them?
A
To show off your amazing prime factor tree skill.
B
To find the LCM.
C
You do not use GCF to simplify fractions.
D
You can break/simplify the fraction to lowest terms in one step.
3) What are the two methods to find GCF?
A
Flip/Flop Listing and Prime Trees.
B
Counting and Multiplying
C
Flip/Flop Listing & Counting
D
Prime Trees and Counting
4) Find the GCF of 15 and 45
A
45
B
15
C
5
D
1
5) Find the GCF of 27 and 45
A
3
B
1
C
135
D
9
6) Simplify 27/45 using the GCF. What is the resulting lowest terms fraction?
A
3/5
B
5/3
C
1/3
D
1/5
7) What do the letters LCM stand for?
A
Lowest Counting Multiplier
B
Largest Common Multiple
C
Least Common Multiple
D
Least Common Member
8) What phrase did we come up with to remind us how LCM trees are different from GCF trees?
A
Leftovers Can Multiply
B
Largest Counters Move
C
Leftovers Can Minus
D
Leftovers Count Money
9) Find the LCM of 26 and 39
A
6
B
78
C
3
D
13
10) Find the LCM of 25 and 30
A
25
B
300
C
5
D
150
*select an answer for all questions
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