Q. 51. A bag contains 20 balls. 8 balls are green, 7 are white and 5 are red. What is the minimum number of balls that must be picked up from the bag blindfolded (without replacing any of it) to be assured of picking at least one ball of each colour?
(A) 17
(B) 16
(C) 13
(D) 11
Answer:
Explanation:
Q. 52. Water tax is increased by 20% and its consumption is decreased by 20%. The change in the expenditure is:
(A) Nil
(B) 5% decrease
(C) 4% increase
(D) 4% decrease
Answer:
Explanation:
Q. 53. A and B can do a piece of work in 72 days. B and C can do it in 120 days. A and C can do it in 90 days. In what time can A alone do it?
(A) 80 days
(B) 100 days
(C) 120 days
(D) 150 days
Answer:
Explanation:
Q. 54. The value of is:
(A) 3
(B) 2
(C) 9/4
(D) 8/3
Answer:
Explanation:
Q. 55. Lakshmi, her brother, her daughter and her son are badminton players. A game of doubles is about to begin:
(i) Lakshmi’s brother is directly across the net from her daughter.
(ii) Her son is diagonally across the net from the worst player’s sibling.
(iii) The best player and the worst player are on the same side of the net.
Who is the best player?
(A) Her brother
(B) Her daughter
(C) Her son
(D) Lakshmi
Answer:
Explanation:
Q. 56. If $A+C=D$; $C-A=B$; $A+D=5$ & $D-A=C$, what is Z-X?
(A) A
(B) B
(C) Y
(D) C
Answer:
Explanation:
Q. 57. Recently, Noble prize in Physics for 2017 was awarded to three scientists Barry C. Barish, Kip S. Thorne and Rosbash for the LIGO to detect
(A) Neutrinos’
(B) Black holes
(C) Gravitational Waves
(D) All of the above
Answer:
Explanation:
Q. 58. The Large Hadron Collider on the border of France and Switzerland is for research on fundamental Physics, has contributed by:
1. Detecting Higgs Boson in 2016
2. Highlighting inter-conversions among different types of neutrinos.
3. Confirming the presence of dark matter and dark energy.
Code:
(A) 1 only
(B) 2 only
(C) 2 and 3 only
(D) None
Answer:
Explanation:
Q. 59. The Fourth Industrial Revolution will result in:
1. Increased penetration of AI based system
2. Decentralized manufacturing
3. Convergence of physical, biological and digital realms
4. Soft robots replacing the humanoids
Codes:
(A) 1, 2 and 3
(B) 2, 3 and 4
(C) 1, 3 and 4
(D) All of the above
Answer:
Explanation:
Q. 60. The Quantum Computers, which are expected to replace today’s supercomputers, operate on the basis of:
1. Entanglement
2. Superposition
3. Optical transistors
Codes:
(A) 1 and 2
(B) 1 and 3
(C) 2 and 3
(D) 1 only
Answer:
Explanation:
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