CBSE Class 7 Mathematics Finding the Unknown MCQs Set C

Question. Total heads in the donkey and children problem are.
(a) 80
(b) 28
(c) 100
(d) 50

Answer: B

Question. If a number increased by 36 is ten times the number, the number is.
(a) 36
(b) 4
(c) 10
(d) 40

Answer: B

Question. If u / 15 = 6, the value of u will be.
(a) 21
(b) 90
(c) 9
(d) 60

Answer: B

Question. In 7 - 8z = 5, moving 7 to other side makes it.
(a) 7
(b) –7
(c) 12
(d) 0

Answer: B

Question. Symbols for unknowns in ancient India were.
(a) x and y
(b) yā, kā, nī
(c) a, b, c
(d) 1, 2, 3

Answer: B

Question. The answer hidden in an unknown number is like a.
(a) fruit in a tree
(b) tree in a seed
(c) flower in a pot
(d) horse in a stable

Answer: B

Question. If we perform the same operation on both sides, the equality is.
(a) changed
(b) maintained
(c) broken
(d) zero

Answer: B

Question. If we have 28p - 36 = 98, finding the value of 28p - 38 will be.
(a) very hard
(b) easy by subtracting 2
(c) only possible by finding p
(d) zero

Answer: B

Question. One horse price in Bhaskara problem was.
(a) 300
(b) 100
(c) 400
(d) 200

Answer: B

Question. An equation with no solution is like.
(a) x = x
(b) x + 4 = x + 5
(c) 2x = 4
(d) y = 0

Answer: B

Question. The book name Hisab al-jabr wal-muqabala means.
(a) seed and fruit
(b) calculation by restoring and balancing
(c) finding the unknown horse
(d) Indian math book

Answer: B

Question. The chapter in Brāhmasphuṭasiddhānta that explains algebra is.
(a) Chapter 1
(b) Chapter 18
(c) Chapter 7
(d) Chapter 10

Answer: B

Question. Number of matchsticks in nth position is given by.
(a) n + 1
(b) 2n + 1
(c) 3n
(d) 2n

Answer: B

Question. Systematic way to solve for single unknown was proposed by.
(a) Newton
(b) Aryabhata and Brahmagupta
(c) Al-Khwarizmi
(d) Mahesh

Answer: B

Question. The symbol lo in ancient India was for.
(a) long number
(b) an unknown
(c) zero
(d) known number

Answer: B

Question. Magic trick final step: add 3 to get 8. The step before adding 3 was.
(a) 0
(b) 5
(c) 10
(d) 2

Answer: B

Question. If 2n + 1 = 99, then the value of 2n is.
(a) 100
(b) 98
(c) 99
(d) 50

Answer: B

Question. Rūpa or rū in ancient India was for.
(a) rupee
(b) known quantity
(c) unknown quantity
(d) zero

Answer: B

Question. When term moves to other side, sign becomes.
(a) same
(b) inverse
(c) zero
(d) double

Answer: B

Question. In ancient India, symbol yā was short for.
(a) yoga
(b) yāvat-tāvat
(c) yantra
(d) yuga

Answer: B