CBSE Class 7 Mathematics Expressions using Letter Numbers MCQs Set 08

Question. When simplifying the expression 3a + 2b, the incorrect simplification given is 5. The correct simplest form is?
(a) 5ab
(b) 3a + 2b
(c) 6ab
(d) 5a + 5b

Answer: B

Question. Simplify the expression 3b - 2b - b.
(a) b
(b) 6b
(c) 0
(d) 2b

Answer: C

Question. When simplifying 6(p + 2), we use the distributive property. The result is?
(a) 6p + 2
(b) 6p + 12
(c) 8p
(d) 12p

Answer: B

Question. Simplify the expression (4x + 3y) - (3x + 4y).
(a) 7x + 7y
(b) x + y
(c) x - y
(d) -x + y

Answer: C

Question. ‘Three times a numbers added to 5' is
(a) 5 + x
(b) 3x + 5
(c) 5x + 3
(d) 15x

Answer: B

Question. Simplify the expression 5 - (2 - 6z).
(a) 3 - 6z
(b) 3 + 6z
(c) 7 - 6z
(d) 3z

Answer: B

Question. Simplify the expression 2 + (x + 3).
(a) 2x + 6
(b) 5x
(c) x + 5
(d) 2x + 3

Answer: C

Question. Simplify the expression 2y + (3y - 6).
(a) 5y - 6
(b) -y + 6
(c) 5y + 6
(d) 2y + 3y

Answer: A

Question. Simplify the expression 7p - p + 5q - 2q.
(a) 7p + 3q
(b) 6p + 3q
(c) 6p + 7q
(d) 7p - 7q

Answer: B

Question. The formula for a number machine is "two times the first number minus the second number". If the inputs are a and b, the algebraic expression is?
(a) 2a + b
(b) a - 2b
(c) 2a - b
(d) 2(a - b)

Answer: C

Question. 9p equals
(a) 9 + p
(b) 9 – p
(c) 9 × p
(d) 9 ÷ p

Answer: C

Question. If the number machine formula is 2a - b, and the inputs are 5 and 2, the result is?
(a) 12
(b) 8
(c) 3
(d) 10

Answer: B

Question. Somjit sees a pattern A B C D E F repeating on a saree border. Design C appears at positions 3, 6, 9... What is the algebraic expression for the n^th occurrence of Design C?
(a) 3 + n
(b) n - 3
(c) 3n
(d) 3n - 1

Answer: C

Question. Design B appears at positions 2, 5, 8, 11... The n^th occurrence of Design B is found using which expression?
(a) 3n
(b) 3n - 1
(c) n + 2
(d) 3n - 2

Answer: B

Question. Design A appears at positions 1, 4, 7, 10... The expression describing the position of the n^th occurrence of Design A is?
(a) 3n + 1
(b) n + 3
(c) 3n - 2
(d) 3n

Answer: C

Question. To find which design (A, B, or C) appears at a position, we divide the position number by 3. If the remainder is 0, the design is?
(a) Design A
(b) Design B
(c) Design C
(d) Design F

Answer: C

Question. ‘p is subtracted from the sum of s and 9′ is written as
(a) (s + 9) – p
(b) p – (s + 9)
(c) p – (s – 9)
(d) p + (s + 9)

Answer: A

Question. In a 2 × 2 calendar square, if the top left number is 'a', the number directly below it is how much more than 'a'?
(a) 1 more
(b) 8 more
(c) 7 more
(d) 6 more

Answer: C

Question. In a 2 × 2 calendar square, if the top left date is 'a', the number to its right will be?
(a) a + 7
(b) a + 8
(c) a + 1
(d) a + 2

Answer: C

Question. In a 2 × 2 calendar square, if the top left date is 'a', the date immediately below it will be?
(a) a + 1
(b) a + 6
(c) a + 7
(d) a + 8

Answer: C