CBSE Class 7 Mathematics Number Play MCQs Set F

Question. If two angles of a triangle are 50° and 60°, what is the third angle?
(a) 60°
(b) 70°
(c) 80°
(d) 90°

Answer: B

Question. If a magic square (sum 15) is taken, and we add 1 to every number in the grid, the new magic sum will be?
(a) 15
(b) 18
(c) 16
(d) 45

Answer: B

Question. If a magic square (sum 15) is taken, and we double every number in the grid, the new magic sum will be?
(a) 15
(b) 30
(c) 25
(d) 45

Answer: B

Question. If we make a magic square using the consecutive numbers 2 to 10, the number that must be placed in the center is?
(a) 5
(b) 6
(c) 10
(d) 2

Answer: B

Question. For a generalized 3 x 3 magic square, if 'm' is the number in the center, the expression for the sum of any row, column, or diagonal is?
(a) m + 1
(b) m x 9
(c) 3m
(d) m x m

Answer: C

Question. What is an exterior angle of a triangle?
(a) The angle between two sides inside the triangle
(b) The angle formed by extending one side and the adjacent side
(c) The angle at the vertex of the triangle
(d) The angle formed by two altitudes

Answer: B

Question. If we create a magic square where the center number (m) is 20, the magic sum for that square will be?
(a) 40
(b) 60
(c) 20
(d) 15

Answer: B

Question. The first ever recorded 4 x 4 magic square in India is called what?
(a) Kubera Yantra
(b) Navagraha Yantra
(c) Lo Shu Square
(d) Chautīsā Yantra

Answer: D

Question. For the historical 4 x 4 magic square known as the Chautīsā Yantra, what is the magic sum?
(a) 4
(b) 16
(c) 34
(d) 100

Answer: C

Question. The first magic square ever recorded, the Lo Shu Square, dates back to ancient times in which country?
(a) India
(b) China
(c) Japan
(d) Europe

Answer: B

Question. If ∠A = 50° and ∠B = 60° in a triangle, what is the measure of the exterior angle at vertex C?
(a) 90°
(b) 100°
(c) 110°
(d) 120°

Answer: C

Question. A 3 x 3 magic square found on a pillar in a temple in Palani, Tamil Nadu, dates back to around which century CE?
(a) 10th century
(b) 8th century
(c) 12th century
(d) 20th century

Answer: B

Question. A 3 x 3 magic square used in Indian homes and shops, associated with planets, is called?
(a) Sun Yantra
(b) Chautīsā Yantra
(c) Navagraha Yantra
(d) Khajuraho Yantra

Answer: C

Question. The Virahāṅka-Fibonacci sequence was first discovered by ancient scholars in India during their study of what subject?
(a) Astronomy
(b) Geometry
(c) Poetry
(d) Banking

Answer: C

Question. When singing a poem, a short syllable lasts for how many beats of time?
(a) Zero beats
(b) One beat
(c) Two beats
(d) Three beats

Answer: B

Question. What is the altitude of a triangle?
(a) A line segment connecting two vertices
(b) A perpendicular line segment from a vertex to the opposite side
(c) A line segment bisecting an angle
(d) A line segment parallel to the base

Answer: B

Question. A long syllable is pronounced for exactly how much longer than a short syllable?
(a) One more time
(b) Three times as long
(c) Half as long
(d) Twice as long

Answer: D

Question. The mathematical puzzle related to poetic rhythms involves writing a number (like 8 beats) as a sum of what two numbers?
(a) 1s and 3s
(b) 1s and 2s
(c) 2s and 4s
(d) 5s and 8s

Answer: B

Question. The number 4 can be written as a sum of 1s and 2s in how many different ways?
(a) 3 ways
(b) 4 ways
(c) 5 ways
(d) 8 ways

Answer: C

Question. The number of 5-beat rhythms (sums of 1s and 2s) is found by adding the number of 4-beat rhythms and what other beat rhythm number?
(a) 1-beat rhythms
(b) 2-beat rhythms
(c) 3-beat rhythms
(d) 6-beat rhythms

Answer: C