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Find the difference between compound interest and simple interest on Rs. 4000 at 10% per annum for 2 years.
ARs. 20
BRs. 30
CRs. 40
DRs. 50
Find the smallest square number that is divisible by each of the numbers 6, 9, and 15.
A450
B900
C1600
D3600
Each interior angle of a regular polygon is 144°. How many sides does the polygon have?
A8
B9
C10
D12
Find the total surface area of a solid hemisphere of radius 7 cm. (Use pi = 22/7)
A308 cm²
B462 cm²
C616 cm²
D924 cm²
In how many ways can the letters of the word ‘LEADER’ be arranged?
A180
B360
C720
D1440
A box contains 3 red, 4 blue, and 5 green balls. If one ball is drawn at random, what is the probability that it is NOT red?
A1/4
B1/3
C3/4
D2/3
If the price of petrol increases by 25%, by what percentage must a motorist reduce consumption so that expenditure remains constant?
A15%
B20%
C25%
D30%