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Number Theory Flashcards | StudBud
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Number Theory
Number Theory
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Answers
1
2
3
x 5 x 7 is the prime factorization for which number?
210
208
240
280
2
Factor the expression 60 + 75
5(12 + 15)
15
135
15(4 + 5)
3
Which is the COMPLETE list of factors for 24?
1, 2, 3, 4, 6, 12, 24
1, 2, 4, 6, 8, 12, 24
1, 2, 3, 6, 8, 12, 24
1, 2, 3, 4, 6, 8, 12, 24
4
If Dave mows his lawn every 6 days and weeds every 8 days, in how many days will he do both?
24
48
12
4
5
What is the prime factorization of 88?
32 x 11
2 x 4 x11
24 x 11
23 x 11
6
Which of the following is a composite number?
59
17
21
43
7
What is the least common multiple of 24 and 40?
240
960
8
120
8
Factor the expression 8
y
+ 10
x
18(x + y)
2xy
2(4y + 5x)
80xy
9
Which of the following numbers is prime?
15
91
111
23
10
68 is divisible by which group of numbers?
2, 3, 6, and 9
2 and 4
2, 4, and 10
2, 3, and 6
11
Factor the expression 20
n
+ 35
5(4n + 7)
15n
55n
20(n +15)
12
Which of the following pair of numbers are relatively prime?
3 and 9
19 and 20
15 and 21
10 and 15
13
2, 3, 4, 6, and 9 go into which of the following numbers?
54
60
36
32
14
Which is the COMPLETE list of factors for 48?
1, 2, 3, 4, 6, 12, 16, 24, 48
1, 2, 3, 4, 6, 8, 12, 16, 24, 48
2, 3, 4, 6, 8, 12, 16, 24, 48
1, 2, 3, 4, 6, 8, 12, 24, 48
15
The greatest # of identical gift bags you can make with 36 pencils and 54 stickers is . . .
9
36
18
54
16
List the FIRST five multiples of 12.
2, 3, 4, 6, 12
12, 24, 36, 48, 60
24, 36, 48, 60, 72
1, 2, 3, 4, and 6
17
Which number is the greatest common factor of 48 and 84?
16
4
12
336
