CBSE Class 8 Mathematics We Distribute Yet Things Multiply MCQs Set 08

Question. Yusuf's method for shaded region uses (n - m).
(a) Plus
(b) Square
(c) Minus
(d) Root

Answer: B

Question. 397 times 403 can be solved by Identity.
(a) 1A
(b) 1B
(c) 1C
(d) None

Answer: C

Question. (a + 1)(b - 1) is same as ab + b - a.
(a) plus 1
(b) minus 1
(c) plus 0
(d) times 2

Answer: B

Question. Sridharacharya formula for a square uses (a + b) (a - b) plus.
(a) a square
(b) b square
(c) ab
(d) 0

Answer: B

Question. What is the identity for the square of the difference of two numbers, (a – b)²?
(a) a² + b²
(b) a² – b²
(c) a² + b² – 2ab
(d) 2a – 2b

Answer: C

Question. Shaded region area (n - m) square is same as (m + n) square minus.
(a) mn
(b) 2mn
(c) 3mn
(d) 4mn

Answer: D

Question. General formula for (a + b) times (c + d) is.
(a) ac + ad + bc + bd
(b) ab + cd
(c) a + b + c + d
(d) acbd

Answer: A

Question. Middle terms 2ab and -2ab are removed in Identity.
(a) 1A
(b) 1B
(c) 1C
(d) 2

Answer: C

Question. Multiplication by 11 is easy because of.
(a) Addition only
(b) Distributive property
(c) Division
(d) Subtracting

Answer: B

Question. (a - b) square is same as (a + (-b)) square.
(a) True
(b) False
(c) Never
(d) Only for 10

Answer: A

Question. A square has side length (x + 5). A smaller square of side x is cut out. What is the remaining area?
(a) 10x + 25
(b) 25 – 10x
(c) x² + 25
(d) 5x + 10

Answer: A

Question. Multiply sum of two numbers by half of the sum, result is.
(a) Half of square of sum
(b) Full square
(c) Sum
(d) Zero

Answer: A

Question. In Step k, number of circles in method 4 is.
(a) k
(b) k + 2
(c) k (k + 2)
(d) 2k

Answer: C

Question. (a - b) square and (b - a) square are.
(a) Different
(b) Equal
(c) Zero
(d) Negative

Answer: B

Question. To flip 3-coin triangle, moves needed is.
(a) 1
(b) 2
(c) 3
(d) 4

Answer: A

Question. (p + 1)(p – 11) = _______
(a) p² + 10p + 11
(b) p² + 10p – 11
(c) p² – 10p + 11
(d) p² – 10p – 11

Answer: D

Question. Distributive property links multiplication and.
(a) Subtraction only
(b) Addition
(c) Division
(d) Nothing

Answer: B

Question. Rule for fast multiplication by 11 involves.
(a) Subtracting digits
(b) Adding digits
(c) Dividing digits
(d) Only zeros

Answer: B

Question. General form for product of two expressions is (a + b) (c + d) equal to.
(a) ac + bd
(b) ac + ad + bc + bd
(c) abcd
(d) a + b + c + d

Answer: B

Question. In algebra, 5a means 5.
(a) plus a
(b) minus a
(c) divide a
(d) times a

Answer: D