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

Question. For two consecutive numbers m and m + 1, sum of squares is.
(a) m + m + 1
(b) m square + (m + 1) square
(c) (m + 1) square
(d) 2m

Answer: B

Question. (6n + 2) square - (4n + 3) square is 5 less than a.
(a) Number
(b) Square number
(c) Odd number
(d) Remainder

Answer: B

Question. Yusuf's method says shaded part is a.
(a) Circle
(b) Square
(c) Triangle
(d) Line

Answer: B

Question. Anusha's method for shaded region gives x square minus.
(a) y
(b) x
(c) xy
(d) 2

Answer: C

Question. Expansion of (a + b) (a - b) is called Identity.
(a) 1A
(b) 1B
(c) 1C
(d) 2

Answer: C

Question. Which ancient Indian mathematical works discussed methods for fast multiplication using the distributive property, known as ‘ista-gunana’?
(a) Lilavati and Aryabhatiya
(b) Brahmagupta’s Brahmasphuṭasiddhānta, Sridharacharya, and Bhaskaracharya’s Lilavati
(c) Euclid’s Elements and Chinese mathematical texts
(d) Bakshali manuscript and Ganita-sara-sangraha

Answer: B

Question. Value of (3a - 9b)(3a + 9b) is 9a square minus.
(a) 9b
(b) 18b
(c) 81b square
(d) b square

Answer: C

Question. JK length in Aditya's method is (x - y) divided by.
(a) 1
(b) 2
(c) 3
(d) 4

Answer: B

Question. In Coin Conjoin, we move how many coins at a time.
(a) 1
(b) 2
(c) 3
(d) 5

Answer: A

Question. For 2 by 2 calendar, diagonal labels are a, a+1, a+7 and.
(a) a+2
(b) a+8
(c) a+10
(d) a-1

Answer: B

Question. Next bigger triangle after 10 coins has how many coins.
(a) 11
(b) 12
(c) 15
(d) 20

Answer: C

Question. What is the algebraic identity for the distributive property of multiplication over addition?
(a) a + (b × c) = (a + b) × (a + c)
(b) a × (b + c) = (a + b) × c
(c) a(b + c) = ab + ac
(d) a + b + c = ab + ac

Answer: C

Question. If x is 8 and y is 3, shaded area x(x-y) is.
(a) 24
(b) 40
(c) 11
(d) 5

Answer: B

Question. Square of 46 can be found using (40 + 6) and Identity.
(a) 1A
(b) 1B
(c) 1C
(d) 2

Answer: A

Question. Expansion of (6x + 5y) square gives 36x square plus 60xy plus.
(a) 5y
(b) 25y
(c) 25y square
(d) 10y

Answer: C

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

Answer: C

Question. In Figure 1, x and y are sides of.
(a) Circles
(b) Rectangles
(c) Triangles
(d) Dots

Answer: B

Question. To flip 6 coins triangle, moves needed is.
(a) 1
(b) 2
(c) 3
(d) 4

Answer: B

Question. Middle number of three consecutive is squared, then subtract product of others, answer is.
(a) 0
(b) 1
(c) 2
(d) 3

Answer: B

Question. Expression for "two more than a square number" is.
(a) 2 + s
(b) s square + 2
(c) (s + 2) square
(d) 2s

Answer: B