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