Quantitative Aptitude Practice Question and Answer
8Q: In a college, number of boys is 75% of number of girls. Difference between boys and girls is 35. On a particular day 20% boys were absent, then find the number of boys those who present? 1643 05b5cc6b7e4d2b4197774d5e2
5b5cc6b7e4d2b4197774d5e2- 172false
- 284true
- 393false
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Answer : 2. "84"
Explanation :
Answer: B) 84 Explanation: Ratio of girls and boys = 100% : 75% = 4:3 Difference is 1 unit = 35 So, 3 units = 35 x 3 = 105 If 20% absent, that’s mean 80% present. So, present boys = 80% of 105 = 80×105100 = 84
Q: 100 percent of which number is 20? 1641 05b5cc6b0e4d2b4197774d28d
5b5cc6b0e4d2b4197774d28d- 1100false
- 2500false
- 320true
- 40false
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Answer : 3. "20"
Explanation :
Answer: C) 20 Explanation: Let the rquired number be 'P' According to the question, 100 x P100 = 20=> P = 20 x 100100 = 20 Hence, 100 percent of the number 20 is 20. Now, you can also try for 20 percent of what number is 100 20 x P100 = 100=> P = 100 x 10020 = 500=> P = 500 Hence, 20 percent of the number 500 is 100.
Q: The price of an article has been reduced by 35%. In order to restore the original price the new price must be increased by ? 1640 05b5cc6dfe4d2b4197774eae4
5b5cc6dfe4d2b4197774eae4- 151.8 %false
- 249.25 %false
- 347.2 %false
- 453.84 %true
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Answer : 4. "53.84 %"
Explanation :
Answer: D) 53.84 % Explanation: 100 65 -------65 ------- 35100 ------ ? => 53.84 %
Q: 12 as a percentage? 1640 05b5cc696e4d2b4197774c570
5b5cc696e4d2b4197774c570- 150%true
- 25%false
- 30.5%false
- 40.05%false
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Answer : 1. "50%"
Explanation :
Answer: A) 50% Explanation: 1/2 as a percentage means 1/2 = 0.5 in decimal Now, in percentage means 0.5 x 100% = 50%.
Q: A cuboid of dimension 24cm x 9cm x 8 cm is melted and smaller cubers are of side 3 cm is formed.find how many such cubes can be formed ? 1640 05b5cc701e4d2b4197774f1c1
5b5cc701e4d2b4197774f1c1- 164true
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Answer : 1. "64"
Explanation :
Answer: A) 64 Explanation: Volume of cuboid = (24 x 9 x 8) cm = 1728 cu.cmVolume of small cube = (3 x 3 x 3) cm = 27 cu.cm So, No. of small cubes formed = 1728/27 = 64.
Q: Two trains are running at 60 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 6 seconds. What is the length of the fast train ? A. 6623 mts B. 6632 mts C.6345 mts D. 6354 mts 1636 05b5cc76fe4d2b4197774ff44
5b5cc76fe4d2b4197774ff44- 1Option Atrue
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Answer : 1. "Option A"
Explanation :
Answer: A) Option A Explanation: As Trains are moving in same direction, Relative Speed = 60-20 = 40 kmph --> 40×518=1009 m/sec Length of Train= Speed * Time Length = 1009×6 ⇒2003=6623 mts
Q: In the following question a number series is given which has only one wrong number. You have to find out the wrong number? 7.5 47.5 87.5 157.5 247.5 357.5 487.5 1636 05b5cc7c9e4d2b41977750e9f
5b5cc7c9e4d2b41977750e9f- 147.5true
- 287.5false
- 3247.5false
- 4357.5false
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Answer : 1. "47.5"
Explanation :
Answer: A) 47.5 Explanation:
Q: In an old Palace there are 50 stairs to go on top floor. Each is 20 cm high, 30 cm wide and 60 cm long. If all the stairs are re-plastered at the rate of Rs. 4 per 100 sq.cm. What is the expenditure ? 1631 05b5cc6cbe4d2b4197774e0f9
5b5cc6cbe4d2b4197774e0f9- 1Rs. 4680false
- 2Rs. 7600false
- 3Rs. 6000true
- 4Rs. 5480false
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Answer : 3. "Rs. 6000"
Explanation :
Answer: C) Rs. 6000 Explanation: Total are of all stairs = 50 (20x60 + 30x60) = 50 (1200 + 1800) = 50 x 3000 = 150000 sq cm. Given rate of 100 sq cm = Rs. 4 Then for 150000 sq. cm = ? => 4 x 150000/100 = Rs. 6000