Question

CB/VIII/2020 Revision Test-1 Page 1 of 2

PODAR INTERNATIONAL SCHOOL (CBSE)

Revision Test-1 (2020-21)

Grade: VIII Maximum Marks: 20

Subject: Mathematics Duration: 45 Minutes

Topics: Rational numbers, Exponents, Algebraic expressions and Linear equation in one

variable

General Instructions:

(i) All questions are compulsory.

(ii) The questions paper consists of 11 questions divided into 4 sections A, B, C and D.

(iii) Section A contains 6 questions of 1 mark each, Section B contains 2 questions of 2

marks each, Section C contains 2 questions of 3marks each, and Section D contains

1 question of 4 marks.

SECTION A

Question numbers 1 to 6 carry 1 mark each. For each of the questions number 1 to

4, four alternative choices have been provided, of which only one is correct. Select

the correct choice.

Q.1 The additive inverse of a

is

b

(1)

a. b b. a

b

c. b

a

d. a

b

Q.2 3

2



3

is equal to (1)

a. 243 b. 729

c. 18 d. 81

Q.3 Which of the following does not have 3b as a factor (1)

a. 3b b. −9ab2

c. 4ab2

d. 12b

2

Q.4 The sum of two numbers is 80.If one of them is 22, what is the second number? (1)

a. 56 b. 58

c. 82 d. 28​

Answer 1

Answer:

Q.3. 4ab²

Q.4. 58

Step-by-step explanation:

Q.3. Divide each no. by 3b and check whether you get an integer.

3b/3b=1.

-9ab²/3b= -3ab

12b/3b=4

But,

4ab²/3b = (4/3)ab.

Since (4/3)ab is not an integer, the answer to Q.3. is 4ab².

Q.4. One number + another number = 80.

So,

22+ another number = 80.

Another number = 80-22= 58.

So, answer to Q.4. is 58.

(Other questions have not been correctly typed. Please post the other questions clearly once more)

Hope this helps!!!!!