Practicing Class 7 Maths MCQ and Class 7 Maths Part 2 Chapter 7 Finding the Unknown MCQ Questions Online Test with Answers daily helps in time management.
MCQ on Finding the Unknown Class 7
Finding the Unknown MCQ Class 7
Class 7 Finding the Unknown MCQ
Question 1.
Which of the following is not allowed in a given equation?
(a) Adding the same number to both sides of the equation.
(b) Subtracting the same number from both sides of the equation.
(c) Multiplying both sides of the equation by the same non-zero number.
(d) Dividing both sides of the equation by the same number.
Answer:
(d) Dividing both sides of the equation by the same number.
Question 2.
The equation which cannot be solved in integers is :
(a) 5y – 3 = -18
(b) 3x – 9 = 0
(c) 3z + 8 = 3z
(d) 9y + 8 = 4y – 7
Answer:
(c) 3z + 8 = 3z
Question 3.
If k + 7 = 16, then the value of 8k – 72 is :
(a) 0
(b) 1
(c) 112
(d) 56
Answer:
(a) 0
Question 4.
Which of the following equations cannot be formed using the equation x = 7?
(a) 2x + 1 = 15
(b) 7x – 1 = 50
(c) x – 3 = 4
(d) x / 7 – 1 = 0
Answer:
(b) 7 x-1=50
Question 5.
The equation for the statement “7 added to 4 x is 19” is :
(a) 7x + 4 = 19
(b) 4x + 7 = 19
(c) 4x – 7 = 19
(d) 7 = 19 – 4x
Answer:
(b) 4 x+7=19
Question 6.
Which of the following is an equation?
(a) 7x – 3
(b) 4y + 11
(c) 9 m+6 = 42
(d) 12k2 – 5
Answer:
(c) 9m + 6 = 42
Question 7.
In a factory, the number of men is seven more than one-sixth of the number of women. If the number of men in the factory is 28, then the number of women in the factory is :
(a) 105
(b) 42
(c) 126
(d) 252
Answer:
(c) 126
Question 8.
What are the two steps involved in solving the equation: 7x + 9 = 44?
(a) Subtracting 9 from both sides and then dividing by 7.
(b) Adding 9 to both sides and then multiplying by 7.
(c) Subtracting 9 from the LHS and multiplying the RHS by 7.
(d) Dividing both sides by 7 and then adding 9.
Answer:
(a) Subtracting 9 from both sides and then dividing by 7.
Question 9.
Which of the following is the value of x such that 5x + 12 = 2?
(a) -2
(b) 2
(c) 10
(d) 5
Answer:
(a) -2
Question 10.
If m – 5 = 9, then the value of 6m – 30 is :
(a) 24
(b) 36
(c) 54
(d) 60
Answer:
(c) 54
Question 11.
Shifting one term from one side of an equation to another side with a change of sign is known as :
(a) commutativity
(b) transposition
(c) distributivity
(d) associativity
Answer:
(b) transposition
Finding the Unknown Class 7 Fill in the Blanks
1. In a test, Abha gets twice the marks as Palak. Two times Abha’s marks and three times Palak’s marks make 280.
(a) If Palak gets x marks, Abha gets ________ marks.
Answer: 2x
(b) The equation formed is ________.
Answer: 4x + 3x = 280
(c) The solution of the equation is ________.
Answer: 40
(d) Marks obtained by Abha are ________.
Answer: 80.
2. If 5 is added to three times a number, it becomes the same as 7 is subtracted from four times the same number. This fact can be represented as ________.
Answer:
3x + 5 = 4x – 7
3. If a number is increased by 20, it becomes 45. Then the number is ________.
Answer:
25
4. The letter used to represent an unknown number is called a ________.
Answer:
variable
5. An equation of the form Ax + B = Cx + D is called a ________equation in one variable.
Answer:
linear
6. Performing the same operation on both sides of an equation does not change the ________.
Answer:
equality
7. In ancient India, algebra was known as ________.
Answer:
bijganita
8. A statement of equality between two algebraic expressions is called an ________.
Answer:
equation