Quantitative Aptitude Practice Question and Answer
8Q: The length of a class room floor exceeds its breadth by 25 m. The area of the floor remains unchanged when the length is decreased by 10 m but the breadth is increased by 8 m. The area of the floor is 1849 05b5cc6b6e4d2b4197774d577
5b5cc6b6e4d2b4197774d577- 15100 sq.mtrue
- 24870 sq.mfalse
- 34987 sq.mfalse
- 44442 sq.mfalse
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Answer : 1. "5100 sq.m"
Explanation :
Answer: A) 5100 sq.m Explanation: Let the breadth of floor be 'b' m. Then, length of the floor is 'l = (b + 25)' Area of the rectangular floor = l x b = (b + 25) × b According to the question, (b + 15) (b + 8) = (b + 25) × b b2 + 8b + 15b + 120 = b2 + 25b 2b = 120 b = 60 m. l = b + 25 = 60 + 25 = 85 m. Area of the floor = 85 × 60 = 5100 sq.m.
Q: 18 as a decimal? 1848 05b5cc6b0e4d2b4197774d2e5
5b5cc6b0e4d2b4197774d2e5- 10.375false
- 20.247false
- 30.214false
- 40.125true
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Answer : 4. "0.125"
Explanation :
Answer: D) 0.125 Explanation: Here 18 in decimal means 8th part in 1. We know that 110 = 0.1 Then, 18 = ? => ? = 18 x 0.1110= 0.1 x 108= 0.5418= 0.125
Q: The area of a square is 1024 sq.cm. What is the ratio of the length to the breadth of a rectangle whose length is twice the side of the square and breadth is 12 cm less than the side of this square ? 1848 05b5cc72ce4d2b4197774f76e
5b5cc72ce4d2b4197774f76e- 114:9false
- 213:12false
- 316:5true
- 417:13false
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Answer : 3. "16:5"
Explanation :
Answer: C) 16:5 Explanation: Area of a square SxS = 1024 => S = 32 cmLength of the rectangle = 32x2 cm = 64 cmBreadth of the rectangle = 32 - 12 = 20 cmRequired ratio = 64 : 20 = 16 : 5
Q: Which of the following is not a prime number? 1843 05b5cc655e4d2b4197774bd59
5b5cc655e4d2b4197774bd59- 15false
- 211false
- 321true
- 437false
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Answer : 3. "21"
Explanation :
Answer: C) 21 Explanation: A prime number is a whole number greater than 1 whose only factors are 1 and itself. Factors of 5 are 1, 5 Factors of 11 are 1, 11 Factors of 21 are 1, 3, 7, 21 Factors of 37 are 1, 37. Hence, according to the definition of a prime number, 21 is not a prime number as it has more than two factors.
Q: At an examination in which maximum marks are 500. K got 10% less than L, L got 25% more than M and M got 20% less than N. If K got 360 marks what percentage of marks was obtained by N ? 1840 05b5cc6c9e4d2b4197774dfab
5b5cc6c9e4d2b4197774dfab- 180true
- 287false
- 378false
- 476false
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Answer : 1. "80"
Explanation :
Answer: A) 80 Explanation: Let marks obtained by N = x M's marks = 0.80x L's marks = 1.25 (0.80x) K's marks = (0.90) (1.25) (0.80x) = 0.9x But 0.9x = 360 ⇒ x = 400 Percentage of Marks obtained by N = 400 x 100/500 = 80%
Q: 217 x 217 + 183 x 183 = ? 1839 05b5cc6e5e4d2b4197774ed10
5b5cc6e5e4d2b4197774ed10- 184521false
- 287487false
- 380578true
- 478458false
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Answer : 3. "80578"
Explanation :
Answer: C) 80578 Explanation: 2172+1832 = 200+172+200-172 It is in the form of a+b2+a-b2=2a2+b2 = 2(40000 + 289) = 80578.
Q: How many seconds will a 600 m long train take to cross a man walking with a speed of 7 km/hr in the direction of the moving train if the speed of the train is 67 km/hr ? 1838 05b5cc6dfe4d2b4197774eb20
5b5cc6dfe4d2b4197774eb20- 129 secfalse
- 258 secfalse
- 336 sectrue
- 444 secfalse
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Answer : 3. "36 sec"
Explanation :
Answer: C) 36 sec Explanation: Speed of train relative to man = 67 - 7 = 60 km/hr.= 60 x 5/18 = 50/3 m/sec. Time taken to pass the man = 600 x 3/50 = 36 sec.
Q: 2500473+ (56)2÷7=? 1835 05b5cc7c8e4d2b41977750e36
5b5cc7c8e4d2b41977750e36- 1547false
- 2475false
- 3455false
- 4None of thesetrue
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Answer : 4. "None of these"
Explanation :
Answer: D) None of these Explanation: