CBSE Class 7 Mathematics Expressions using Letter Numbers MCQs Set J

Question. Add the expressions: 4d - 7c + 9 and 8c - 11 + 9d. The sum is?
(a) 13d + c - 2
(b) 5d + c + 2
(c) 13d - 15c - 2
(d) 13d - c + 20

Answer: A

Question. Add the expressions: - 6f + 19 - 8s and - 23 + 13f + 12s. The sum is?
(a) 7f + 4s - 4
(b) 19f + 20s - 42
(c) -7f - 4s + 4
(d) 7f - 4s + 4

Answer: A

Question. Subtract 9a - 6b + 14 from 6a + 9b - 18. The expression should be written as?
(a) (9a – 6b + 14) – (6a + 9b – 18)
(b) 6a + 9b – 18 - 9a - 6b + 14
(c) (6a + 9b – 18) – (9a – 6b + 14)
(d) 9a – 6b + 14 - 6a - 9b + 18

Answer: C

Question. Subtract 9a - 6b + 14 from 6a + 9b - 18. The final simplified difference is?
(a) -3a + 15b - 32
(b) 15a + 3b - 4
(c) 3a - 15b + 32
(d) 3a + 3b + 4

Answer: A

Question. Subtract - 15x + 13 - 9y from 7y - 10 + 3x. The resulting expression is?
(a) 18x + 16y - 23
(b) -12x - 16y - 23
(c) 18x + 16y + 23
(d) 18x - 16y - 23

Answer: A

Question. If the price per pencil is ₹ c and price per eraser is ₹ d. Then, the algebraic expression representing the price of 2 pencils and 6 erasers is (in ₹)
(a) 6 + 2 + c + d
(b) cd + 6 + 2
(c) 6c + 2d
(d) 2c + 6d

Answer: B

Question. Give a situation corresponding to the algebraic expression 8x + 3y.
(a) 8 items plus 3 items.
(b) Cost of 8 pens (x) and 3 books (y).
(c) 8 times x minus 3 times y.
(d) 11 times xy.

Answer: B

Question. Give a situation corresponding to the algebraic expression 15x - 2x.
(a) Buy 15 apples (x) and return 2 apples (x).
(b) 13 items sold at price x.
(c) Total cost of 15 items minus the cost of 2 items.
(d) All of the above are possible situations.

Answer: D

Question. If a straight rope is folded r times and cut once, the number of pieces obtained is given by the expression?
(a) r + 1
(b) 2r + 1
(c) 2r
(d) r + 2

Answer: B

Question. If the rope is folded 10 times and cut once, how many pieces will you get?
(a) 11
(b) 20
(c) 21
(d) 22

Answer: C

Question. In the matchstick pattern where squares are joined (1 square needs 4 sticks, 2 squares need 7 sticks), how many extra sticks are needed for each new square added?
(a) 4
(b) 3
(c) 1
(d) 2

Answer: B

Question. The value of 3(x+y) - 3(x-y) is equal to
(a) 6 x
(b) 0
(c) 6 y
(d) 3 x

Answer: C

Question. If 'w' is the number of squares in the matchstick pattern, the expression for the total number of matchsticks required is?
(a) 4w
(b) 3w + 1
(c) w + 3
(d) w + 4

Answer: B

Question. How many matchsticks are required to make 10 such squares using the formula 3w + 1?
(a) 40
(b) 31
(c) 13
(d) 29

Answer: B

Question. In the traffic signal sequence (R, A, G, Y, R, A, G, Y...), the sequence repeats every how many colors?
(a) 3
(b) 4
(c) 5
(d) 6

Answer: B

Question. The value of p + p + q + q - p - q is equal to
(a) 2p + 2q
(b) p + q
(c) 2p
(d) 2q

Answer: B

Question. The traffic signal sequence repeats every 4 positions. If a position number is divided by 4 and the remainder is 0, the color is?
(a) Red (R)
(b) Amber (A)
(c) Green (G)
(d) Yellow (Y)

Answer: D

Question. A number 124 appears in an endless 4-column grid. The question is which row and column it will appear in. We use patterns to solve this. If 124 is divided by 4, the remainder is 0. This means it appears in which column?,
(a) Column 1
(b) Column 2
(c) Column 3
(d) Column 4

Answer: D

Question. Let Ram uses two matchsticks to make a ‘V'-shaped structure. He uses four matchsticks to make two ‘V-shaped structures and six matchsticks for making three. Then, the number of matchsticks used by Ram to make r' V-shaped structures, is
(a) 2 + r
(b) 2 r
(c) r + 1
(d) 3 r

Answer: B