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Pre-Calculus - Rational Numbers
This Math quiz is called 'Pre-Calculus - Rational Numbers' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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Have you heard about calculus? It is yet another extension of math. Depending upon your field of interest in high-school, and later college, some of you will never get into full calculus but whether you decide on a career that will require it or not, it’s important to know some of the very simple basics of calculus. And the very basic is that of rational numbers.
1 .
Which of the following numbers is NOT a rational number?
24
195
√73
.10
Answers (a), (b) and (d) can each be put into simple fractions making them all rational numbers. However, Answer (c) cannot be put into a simple fraction as it is a square root. This means it is NOT a rational number. Answer (c) is the correct answer
2 .
Which of the following numbers is a rational number?
1
3.14159...
√71
√53
Answer (b) is the number for pi (π) and pi (π) is NOT a rational number. Answers (c) and (d) are both square root numbers and cannot, therefore, be written into a simple fraction. Answer (a) can be written as 1⁄1 which is a simple fraction. Answer (a) is the correct answer
3 .
Which of the following numbers is a rational number?
π
√17
-85
√37
Answer (a) shows the symbol of pi (π) which cannot be written into a simple fraction. Because of this, it is not correct. Answers (b) and (d) are square roots and they, too, cannot be written as simple fractions. Answer (c), however, can be written as -85⁄1. As this includes a simple fraction, it is a rational number. Answer (c) is the correct answer
4 .
Which of the following numbers is NOT a rational number?
100
π
56
78
Answers (a), (c) and (d) can each be put into simple fractions making them all rational numbers. However, Answer (b) is pi which equals 3.14159... and it cannot be put into a simple fraction. Therefore, Answer (b) is the correct answer
5 .
Which of the following numbers is a rational number?
√29
√2
√69
.432
Answers (a), (b) and (c) are all square root numbers and cannot, therefore, be written into a simple fraction. Answer (d) can be written as 432⁄1000 which is a simple fraction. Answer (d) is the correct answer
6 .
Which of the following numbers is NOT a rational number?
√41
.222
-16
3/4
Answers (b) and (c) can be put into simple fractions and answer (d) already is a simple fraction so these numbers are all rational numbers. However, Answer (a) cannot be put into a simple fraction as it is a square root. This means it is NOT a rational number. Answer (a) is the correct answer
7 .
Which of the following numbers is a rational number?
.7906874197...
.348790...
.25
.165972...
Answers (a), (b) and (d) are all similar to pi (π). They cannot be turned into simple fractions. However, Answer (c) can be rewritten as 25⁄100 or 1⁄4 which is a simple fraction. Answer (c) is the correct answer
8 .
Which of the following numbers is a rational number?
.543987543...
63
√19
.8954398658...
Answers (a) and (d) fall into the same category as does pi (π). They cannot be converted into simple fractions so they are not rational numbers. Answer (c) is a square root and it, too, cannot be written as a simple fraction. Answer (b) can be written into a simple fraction such as 63⁄1 so it is a rational number. Answer (b) is the correct answer
9 .
Which of the following numbers is a rational number?
√11
1.333
√23
π
Answers (a) and (c) are square roots and they cannot be written as simple fractions. Because of this, they are NOT rational numbers. Answer (d) shows the symbol of pi (π). π = 3.14159... and it cannot be written into a simple fraction so it is not the correct answer either. However, Answer (b) can also be written as 1333⁄1000. As this includes a simple fraction, it is a rational number. Answer (b) is the correct answer
10 .
Which of the following numbers is NOT a rational number?
14
1/4
40
√5
Answers (a) and (b) can be put into simple fractions and answer (b) is a simple fraction so they are all rational numbers. However, Answer (d) cannot be put into a simple fraction so it is not a rational number. Answer (d) is the correct answer
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