Prime Numbers & Factors
1. Which of the following are prime numbers
and which are composite numbers ?
25, 7, 18, 29, 51
2. What prime numbers are factors of 36?
3. Which of the following are multiples of 3 ?
45, 53, 51, 39, 47
4.
Find the prime factors of 27.
Answers:
1. Prime: 7, 29
Composite: 25, 18, 51
2. 36 = 2 x 2 x 3 x 3
3. 45, 51, 39
4. 27 = 3 x 3 x 3
Order of Operations
1. 10 + 5 = (10) + (+5) = ?
2. Add 9, 16, and 25
3. 7 1  3 = (7) + (1) + (3) = ?
4. Add 22 and 13
Answers:
1.
5
2.
0
3.
11
4.
35
Multiply as indicated:
1. 5(8) = ?
2. 7(3) (2) = ?
3. 6(1)(4) = ?
4. 2(3)(4)(5)(6) = ?
Answers:
1. 40
2. 42
3. 24
4. 720
Multiply and divide as indicated:
Answers:
1. 3
2. 1
3. 2
4. 9
Distribution
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Fractions
Solve:
1. What fraction of 1 foot is 11 inches?
2. Represent 3 out of 8 as a fraction.
3. Write the fractions that indicate the
relationship of 2 to 3; 8 divided by 9; and 6
out of 7 equal parts
4.
Answers:
1. 11/12
2. 3/8
3. 2/3; 8/9; 6/7
4. plus
Using the divisions on a ruler for reference,
complete the following exercise:
Answers:
1. 2
2. 2
3. 12
4. 4
Supply
the missing number in each of the
following:
Answers:
1. 80
2. 11
3. 27
4. 36
5. 6
6. 16
Reduce the following fractions to lowest
terms:
Answers:
Change the following fractions to mixed
numbers:
1. 31/20
2. 33/9
3. 65/20
4. 45/8
Answers :
Change the following mixed numbers to
improper fractions:
Answers:
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 Spring '11
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 Elementary arithmetic, 4%, 3%, 1 foot, Mathematics in medieval Islam, 2%

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