Class 7 maths Rational numbers

Class 7 maths Rational numbers

6th Grade

33 Qs

quiz-placeholder

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Class 7 maths Rational numbers

Class 7 maths Rational numbers

Assessment

Quiz

Education

6th Grade

Practice Problem

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33 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Express (-192/108) as a rational number with numerator:

(i) 64

72/-25

64/-36

64/33

28/-36

Answer explanation

Given (-192/108)

To get numerator 64 we have to divide both numerator and denominator by -3

Then we get, (-192/108) ÷ (-3/-3)

= (64/-36)

Therefore (-192/108) as a rational number with numerator 64 is (64/-36)

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Express each of the following rational numbers to the lowest form:

(i) (4/22)

1/11

2/10

6/55

2/11

Answer explanation

Given (4/22)

We know that HCF of 4 and 22 is 2

By dividing the given number by its HCF we get

(4 ÷ 2/22 ÷ 2) = (2/11)

Therefore (2/11) is the simplest form of the given number

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Express each of the following rational numbers to the lowest form:

(i) (132/-428)

85/-36

33/-107

22/-55

87/-64

Answer explanation

Given (132/-428)

We know that HCF of 132 and 428 is 4

By dividing the given number by its HCF we get

(132 ÷ 4/-428 ÷ 4) = (33/-107)

Therefore (33/-107) is the simplest form of the given number

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Fill in the blanks:

(i) (-5/7) = (…/35) = (…/49)

-71/53

-61/22

-35/49

44/52

Answer explanation

Given (-5/7) = (…/35) = (…/49)

Here (-5/7) × (5/5) = (-25/35)

And also (-5/7) × (7/7) = (-35/49)

(ii) (-4/-9) = (8/18) = (12/27)

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Write each of the following rational numbers in the standard form:

(i) (2/10)

8/5

5/3

2/4

1/5

Answer explanation

Given (2/10)

We know that HCF of 2 and 10 is 2

Now dividing the numerator and denominator by HCF i.e. 2, we get:

(2/10) ÷ (2/2) = (1/5)

Therefore (1/5) is the standard form of given number

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

In each of the following pairs represent a pair of equivalent rational numbers, find the values of x.

(i) (2/3) and (5/x)

25/2

16/3

15/2

22/5

Answer explanation

Given (2/3) and (5/x)

Also given that they are equivalent rational number so (2/3) = (5/x)

x = (5 × 3)/2

x = (15/2)

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

In each of the following pairs represent a pair of equivalent rational numbers, find the values of x.

(13/6) and (-65/x)

82

-30

22

37

Answer explanation

Given (13/6) and (-65/x)

Also given that they are equivalent rational number so (13/6) = (-65/x)

x = 6/13 x (- 65)

x = 6 x (-5)

x = -30

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