CBSE Class 7 Mathematics Expressions using Letter Numbers MCQs Set 03

Question. As a standard practice, when writing algebraic expressions, how do we shorten the writing of '4 × n'?
(a) n4
(b) 4(n)
(c) 4n
(d) 4 + n

Answer: C

Question. Find the value of expression 7k when the letter-number k is given as 4. The value is?
(a) 11
(b) 74
(c) 28
(d) 16

Answer: C

Question. Ketaki buys 'c' coconuts at Rs 35 each and 'j' kg jaggery at Rs 60 per kg. Total amount to be paid expression is?
(a) 35 + 60 + c + j
(b) 35c/60j
(c) c × 35 + j × 60
(d) 95(c + j)

Answer: C

Question. Which expression represents the perimeter of a square with side q?
(a) q + q
(b) q × 3
(c) 4 × q
(d) q + 4

Answer: C

Question. The expression 5m + 3 takes the value 13 when the value of m is?
(a) m = 1
(b) m = 3
(c) m = 2
(d) m = 5

Answer: C

Question. Look at the expressions 5u and 5 + u. The expression 5u means what?
(a) u more than 5
(b) 5 added to u
(c) 5 times the number u
(d) u is 5

Answer: C

Question. Expression for the total cost of c chairs at ₹ 120 each and t tables at ₹ 450.
(a) 120c + 450t
(b) c + t × 450
(c) 450(c + t)
(d) 120 + 450

Answer: A

Question. Shabnam's age is a + 3. If Aftab's age 'a' is 23 years, Shabnam’s age will be?
(a) 20 years
(b) 23 years
(c) 26 years
(d) 32 years

Answer: C

Question. Which expression gives the perimeter of a rectangle?
(a) 2l + 2b
(b) l + b
(c) l × b
(d) 2l – 2b

Answer: A

Question. We can use any letter to denote Aftab's age. The letters used for this purpose are conventionally called what?
(a) Variables
(b) Letters
(c) letter-numbers,
(d) Symbols

Answer: C

Question. Aftab is 3 years younger than Shabnam. If Shabnam's age (s) is 20, Aftab's age will be?
(a) 23 years
(b) 20 years
(c) 17 years
(d) 60 years

Answer: C

Question. Parthiv needs 2 matchsticks for every L pattern. If he makes 7 L shapes, the number of matchsticks needed is?
(a) 9
(b) 12
(c) 14
(d) 16

Answer: C

Question. If the number of L shapes is n, the expression 2 x n tells us what?
(a) How many Ls are made
(b) The length of the matchsticks
(c) The number of matchsticks needed
(d) The shape of the L

Answer: C

Question. What is the simplified form of 5c + 3c + 10c?
(a) 18
(b) 18c
(c) c
(d) 5 × 3 × 10

Answer: B

Question. Ketaki buys 8 coconuts at ₹35 each and 9 kg jaggery at ₹60 per kg. The total cost is?
(a) ₹700
(b) ₹820
(c) ₹600
(d) ₹740

Answer: B

Question. A mathematical relation expressed using letter-numbers is often called a what?
(a) Term
(b) Theorem
(c) Formula
(d) Identity

Answer: C

Question. Find the perimeter of a regular pentagon if its side length is 's'. The formula should be?
(a) 4s
(b) s + 5
(c) 5s
(d) s⁵

Answer: C

Question. Munirathna has a 20 m pipe. He joins another pipe of length k. If k=15 m, the combined length is?
(a) 2015 m
(b) 5 m
(c) 35 m
(d) 20 m

Answer: C

Question. If v = number of units, what is the area of a rectangle with length (4 + 3) and width v?
(a) 4v
(b) 3v
(c) 7v
(d) v⁷

Answer: C

Question. Krithika has x notes of ₹100, y notes of ₹20, and z notes of ₹5. The expression for her total amount is?
(a) x + y + z
(b) 100x x 20y x 5z
(c) 100x + 20y + 5z,
(d) 125(x + y + z)

Answer: C