MG9 chapter 1
17 marks from 17 questions
Question 1
A number that can be written as a fraction is called a _______________________ number.
Select the correct word to complete this sentence.
a. irrational
b. rational
Question 2
Which one of these numbers is called an irrational number?
a.
–3
b.
c.
Question 3
A number that cannot be written as a fraction is called an _______________________ number.
Select the correct word to complete this sentence.
a. irrational
b. rational
Question 4
What type of number is
?
a. irrational
b. rational
Question 5
All terminating decimals are rational numbers.
Is this statement true or false?
a. True
b. False
Question 6
The square root of
is __________________ .
Select the correct word to complete this sentence.
a. irrational
b. rational
Question 7
Which of these numbers is a surd?
a.
b.
c.
d.
Question 8
Which of these numbers is an irrational number?
a.
b. 3.333 …
c.
d. 7
Question 9
Select all the true statements.
a. All surds are rational numbers.
b. All fractions are irrational numbers.
c. All decimals can be written as fractions.
d. The square root of a prime number is always irrational.
Question 10
A whole number less than 100 has a rational square root and a rational cube root.
What is this number?
Question 11
Without using a calculator, estimate the value of
to the nearest integer.
≈
Question 12
Use your calculator to evaluate:
3.5 × 108 × 40 =
× 10
Question 13
In scientific notation, numbers are written in the form:
NUMBER × 10POWER
The NUMBER is:
a.
1 digit
b.
1 or 2 digit
1, 2 or 3
c.
digit
d.
always a whole number
Question 14
Since 2.7 is neither a very small nor very large number it is not usually written in scientific notation.
However, it can be if needed.
Write 2.7 in scientific notation.
2.7 = 2.7 × 10
Question 15
=4
Question 16
7 3× 7 x = 7 9
x=
Question 17
When x = 3, 5−x =