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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 Common Fraction
B
Greatest Counting Fraction
C
Greatest Common Factor
D
Greatest Counting Factor
2) When simplifying fractions, what is the benefit of finding the GCF to break them?
A
To find the LCM.
B
To show off your amazing prime factor tree skill.
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
Prime Trees and Counting
C
Flip/Flop Listing & Counting
D
Counting and Multiplying
4) Find the GCF of 15 and 45
A
1
B
15
C
5
D
45
5) Find the GCF of 27 and 45
A
135
B
1
C
9
D
3
6) Simplify 27/45 using the GCF. What is the resulting lowest terms fraction?
A
3/5
B
5/3
C
1/5
D
1/3
7) What do the letters LCM stand for?
A
Largest Common Multiple
B
Lowest Counting Multiplier
C
Least Common Member
D
Least Common Multiple
8) What phrase did we come up with to remind us how LCM trees are different from GCF trees?
A
Leftovers Can Minus
B
Leftovers Count Money
C
Largest Counters Move
D
Leftovers Can Multiply
9) Find the LCM of 26 and 39
A
13
B
3
C
6
D
78
10) Find the LCM of 25 and 30
A
25
B
5
C
300
D
150
*select an answer for all questions
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