Find the geometric mean of 3, 9, and 27.
A3
B6
C9
D12
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Archives: MCQs
Evaluate: sin(30°) * cos(60°) + cos(30°) * sin(60°).
A0
B0.5
C1
D1.5
If the radius of a sphere is doubled, by what factor does its volume increase?
A2 times
B4 times
C6 times
D8 times
A sum of money quadruples (becomes 4 times) in 12 years at simple interest. Find the rate of interest per annum.
A20%
B22.5%
C25%
D30%
The parallel sides of a trapezium are 12 cm and 18 cm, and its area is 150 cm². Find the height of the trapezium.
A8 cm
B10 cm
C12 cm
D15 cm
Find the remainder when 2x^3 – 5x^2 + 3x + 7 is divided by (x – 1).
A5
B6
C7
D8
A bag contains 4 red, 5 green, and 6 yellow balls. A ball is drawn at random. What is the probability that it is green or yellow?
A1/3
B2/3
C11/15
D4/15
If a:b = 3:5 and b:c = 10:9, find a:b:c.
A3 : 5 : 9
B6 : 10 : 9
C6 : 10 : 15
D9 : 15 : 10
A person buys 12 items for Rs. 10 and sells 10 items for Rs. 12. Find his profit percentage.
A20%
B33.33%
C44%
D50%
A train running at 72 km/h crosses a 200 m long tunnel in 20 seconds. What is the length of the train?
A150 m
B200 m
C250 m
D300 m