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211. Find the mean proportion between 5 and 45.
A. 9
B. 15
C. 25
D. 50
212. If X:Y = 2:3, Y:Z = 4:5. Find X:Y:Z.
A. 2:3:5
B. 8:12:15
C. 2:8:5
D. 2:7:5
213. The ratio of two numbers a and b is 3:5. If 2 is added to both the numbers, the ratio becomes 2:3. Find b.
A. 15
B. 10
C. 8
D. 5
214. The plan for a rectangular area is drawn to a scale of 1:500. If the length and breadth in the plan is 30 cm and 20 cm, find the actual area.
A. 1200 m²
B. 1500 m²
C. 12000 m²
D. 15000 m²
215. By selling Toffees at 20 for a rupee, a man loses 40 %. To gain 20 %, for one rupee he must sell?
A. 16 toffees
B. 20 toffees
C. 25 toffees
D. 24 toffees
216. By selling 12 oranges for one rupee, a man loses 20%. How many for a rupee should he sell to get a gain of 20%?
A. 5
B. 8
C. 10
D. 15
217. A dealer professing to sell at cost price uses a 900 gms weight for a kilogram. His gain percent is:________?
A. 9
B. 10
C. 11
D. 11 1/9
218. A man sold 20 articles for Rs. 60 and gained 20%. How many articles did he buy for Rs.60?
A. 22
B. 24
C. 25
D. 26
219. The C.P of an article is 40% of the S.P. The percent that the S.P is of C.P is:________?
A. 40
B. 60
C. 240
D. 250
220. A man purchased a watch for Rs. 400 and sold it at a gain of 20% of the selling price. The selling price of the watch is:__________?
A. Rs. 300
B. Rs. 320
C. Rs. 440
D. Rs. 500