Expressions using Letter Numbers Class 7 Assertion and Reason Questions
easyExpressions using Letter Numbers Class 7 Assertion and Reason Questions
Expressions using Letter-Numbers Class 7 Assertion and Reason Questions
In each of the following questions, two statements have been given. One has been labelled as Assertion (A) and the other has been labelled as Reason (R). You have to choose the correct option, from the given four options.
(a) Both the statements (A) and (R) are correct and (R) is the correct explanation of (A).
(b) Both the statements (A) and (R) are correct but (R) is not the correct explanation of (A).
(c) (A) is correct but (R) is not correct.
(d) (R) is correct but (A) is not correct.
1. (A): Perimeter of a regular pentagon of side lengths 4 cm is 20 cm.
(R): Perimeter of a regular polygon of h sides with side lengths m units is nm units.
Answer:
(a) Both the statements (A) and (R) are correct and (R) is the correct explanation of (A).
2. (A): The expression 6(x - 3) simplifies to 6x - 3.
(R): According to distributive property, a(b + c) = ab + ac.
Answer:
(d) (R) is correct but (A) is not correct.
3. (A): If a person is x years old now, then after 6 years, he will be of age (x + 6) years.
(R): To find the age of a person after 2 years, we subtract 2 years from his present age.
Answer:
(c) (A) is correct but (R) is not correct.
4. (A): Number of terms in the expression 5x - 7y + 22 is 3.
(R): This expression has two variables x and y.
Answer:
(b) Both the statements (A) and (R) are correct but (R) is not the correct explanation of (A).
5. (A): The number of variables in the expression 9x - 8y + 32 + 4u + 9 is 4.
(R): Here x, y, 2 and u are letter numbers.
Answer:
(a) Both the statements (A) and (R) are correct and (R) is the correct explanation of (A).