Simple Arithmatic

Arithmetic & Mental Ability – 4

A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?

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If p means -, q means +, r means ÷ and s means x then 16p4q5s8r2
a) -8
b) 20
c) 32
d) 12
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Rani ranks 12th in a class of fortyseven students. What is her rank from the bottom?
a) 27
b) 28
c) 26
d) 36
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Weights of two friends Ram and Shyam are in the ratio 4:5. Ram's weight increased 10% and total weight of Ram and Shyam become 82.8 kg, with an increases of 15%. By what percent did the weight of Shyam increase?
a) 19%
b) 10%
c) 21%
d) 16%
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Forty boys are standing in a row facing the North. Amit is eleventh from the left and Deepak is thirty first from the right end of the row. How far will Shreya, who is third to the right of Amit in the row, he from Deepak.
a) 2nd
b) 3rd
c) 4th
d) 5th
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The average age of a husband and a wife was 27 years when, they married 4 years ago. The average age of the husband, the wife and a new-born child is 21 years now. The present age of the child is.
a) 4 years
b) 3 years
c) 2 years
d) 1 year
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In one glass, milk and water are mixed in the ratio 3:5 and in another glass they are mixed in the ratio 6:1 In what ratio should the contents of the two glasses be mixed together so that the new mixture contains milk and water in the ratio 1:1?
a) 20:7
b) 8:3
c) 27:4
d) 25:9
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Two equal amounts of money are deposited in two banks, each at 15% per annum, for 3 1/2 years and 5 years respectively. If the difference between their interests is 144, find the sum.
a) ₹ 400
b) ₹ 300
c) ₹ 640
d) ₹ 720
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The cube root of .000216 is:
a) 0.6
b) 0.06
c) 77
d) 87
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A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
a) (3/4)
b) (4/7)
c) (1/8)
d) (3/7)
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Madhu is older than Suman, Meena is younger than Sobha. Rita is older than Madhu but not as old as Meena. Who is the youngest?
a) Sobha
b) Suman
c) Rita
d) Meena
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A is 3 year older to B and 3 year younger to C, while B and D are twins. How many years older is C to D
a) 2
b) 3
c) 6
d) 12
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If x means -, + means —, – means X and = means -, then 8×78+40+2=?
a) 1
b) 75
c) 85
d) 44
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If PARROT=123345 and SOAT=6425 then how would ROAST be written in that same code language
a) 32456
b) 32564
c) 34625
d) 34265
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Ravi travelled 4 km straight towards South. He turned left and travelled 6 km straight, then turned right and travelled 4 km straight. How far is he from the starting point?
a) 8 km
b) 10 km
c) 12 km
d) 18 km
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A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:
a) Rs. 456
b) Rs. 458
c) Rs. 558
d) Rs. 568
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If 60% of a number is added to 1200, the result is 3 times of the number. The number is
a) 500
b) 600
c) 750
d) 800
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The ratio, in which tea costing Rs. 192 per kg is to be mixed with tea costing Rs. 150 per kg so that the mixed tea when sold for Rs. 194.40 per kg, gives a profit of 20%.
a) 2:05
b) 3:05
c) 5:03
d) 5:02
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(0.1 x 0.1 x 0.1 + 0.02 x 0.02 x 0.02)/(0.2 x 0.2 x 0.2 + 0.04 x 0.04 x 0.04) is
a) 0.0125
b) 0.125
c) 0.25
d) 0.5
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The rational number for recurring decimal 0.125125…. is:
a) 63/487
b) 119/993
c) 125/999
d) 159/993
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If the 25th of August in a year is Thursday, the number of Mondays in that month is
a) 3
b) 4
c) 5
d) 6
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A man is performing yoga with his head down and legs up. His face is towards the West. In which direction will his left hand be?
a) North
b) South
c) East
d) West
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The average age of 29 boys in the class is 14 years. When the age of class teacher is included the average becomes 15 years. The age of the class teacher is:
a) 44
b) 42
c) 46
d) 40
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A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
a) 40 minutes
b) 1 hour
c) 1 hr 15 min
d) 1 hr 30 min
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A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
a) 2:01
b) 3:02
c) 8:03
d) Cannot be determined
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In a 729 litres mixture of milk and water, the ratio of milk to water is 7:2. to get a new mixture containing milk and water in the ratio 7:3, the amount of water to be added is:
a) 81 litres
b) 71 litres
c) 56 litres
d) 50 litres
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