Quantitative Aptitude Practice Question and Answer

Q: If k : l = 4 : 3 and l : m = 5 : 3, then find k : l : m ? 2254 0

  • 1
    18 : 24 : 11
    Correct
    Wrong
  • 2
    9 : 15 : 1
    Correct
    Wrong
  • 3
    20 : 15 : 9
    Correct
    Wrong
  • 4
    21 : 7 : 3
    Correct
    Wrong
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Answer : 3. "20 : 15 : 9"
Explanation :

Answer: C) 20 : 15 : 9 Explanation: Given k : l = 4 : 3l : m = 5 : 3 Then k : l : m = 20 : 15 : 9

Q: Find the missing number in the given number series? 514, 470, ?, 415, 404 2253 0

  • 1
    441
    Correct
    Wrong
  • 2
    437
    Correct
    Wrong
  • 3
    426
    Correct
    Wrong
  • 4
    420
    Correct
    Wrong
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Answer : 2. "437"
Explanation :

Answer: B) 437 Explanation: Given number series is 514   470   ?   415   404       Here the pattern it follows is   514   514 - 44 = 470   470 - 33 = 437   437 - 22 = 415   415 - 11 = 404   Hence, the missing number in the given number series is 437.

Q: A man could buy a certain number of notebooks for Rs.300. If each notebook cost is Rs.5 more, he could have bought 10 notebooks less for the same amount. Find the price of each notebook ? 2251 0

  • 1
    15
    Correct
    Wrong
  • 2
    20
    Correct
    Wrong
  • 3
    10
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 3. "10"
Explanation :

Answer: C) 10 Explanation: Let the price of each note book be Rs.x. Let the number of note books which can be brought for Rs.300 each at a price of Rs.x be y. Hence xy = 300 => y = 300/x (x + 5)(y - 10) = 300 => xy + 5y - 10x - 50 = xy =>5(300/x) - 10x - 50 = 0 => -150+x2+5x multiplying both sides by -1/10x => x2+15x-10x-150=0 => x(x + 15) - 10(x + 15) = 0 => x = 10 or -15 As x>0, x = 10.

Q: Total number of students in 3 classes of a school is 333 . The number of students in class 1 and 2 are in 3:5 ratio and 2 and 3 class are 7:11 ratio . What is the strength of class that has highest number of students ? 2250 0

  • 1
    125
    Correct
    Wrong
  • 2
    155
    Correct
    Wrong
  • 3
    135
    Correct
    Wrong
  • 4
    165
    Correct
    Wrong
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Answer : 4. "165"
Explanation :

Answer: D) 165 Explanation: Ratio C1:C2 = 3:5 and C2:C3 = 7:11So C1:C2:C3 = 21 : 35 : 55Let the strength of three classes are 21x, 35x and 55x respectively, then Given that 21x + 35x + 55x = 333=> 111x = 333 or x=3So strength of the class with highest number of students =55x = 55x3 = 165.

Q: A person takes a loan of Rs. 200 at 5% simple interest. He returns Rs.100 at the end of one year. In order clear his dues at the end of 2 years, he would pay : 2247 0

  • 1
    Rs. 100
    Correct
    Wrong
  • 2
    Rs. 105
    Correct
    Wrong
  • 3
    Rs. 115
    Correct
    Wrong
  • 4
    Rs. 110
    Correct
    Wrong
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Answer : 3. "Rs. 115"
Explanation :

Answer: C) Rs. 115 Explanation: Amount to be paid = Rs.100+200×5×1100+100×5×1100= Rs. 115.

Q: The respective ratio between the speed of a bike, a van  and lorry is 3 : 5 : 2. The speed of the van is 250 percent of the speed of the lorry which covers 360 km in 12 hours. What is the average speed of the bike and the van together? 2247 0

  • 1
    60 kmph
    Correct
    Wrong
  • 2
    62 kmph
    Correct
    Wrong
  • 3
    64 kmph
    Correct
    Wrong
  • 4
    63 kmph
    Correct
    Wrong
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Answer : 1. "60 kmph"
Explanation :

Answer: A) 60 kmph Explanation: Speed of lorry = 36012 = 30 kmph Speed of van =250100 x 30 = 75 kmph Speed of bike = 35 x 75 = 45 kmph Therefore, now required average speed of bike and van  = 75 + 452= 60 kmph.

Q:

Mr. Khanna took a loan of Rs 10,000 on simple interest for two years at the rate 3% per annum. The total amount that he will be paying as interest in 2 year is 3% of his monthly salary. What his monthly salary?

2243 0

  • 1
    Rs 30,000
    Correct
    Wrong
  • 2
    Rs 16,000
    Correct
    Wrong
  • 3
    Rs 20,000
    Correct
    Wrong
  • 4
    Rs 12,000
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 3. "Rs 20,000"
Explanation :

3% of SI=PRT/100

10,000*3*2/100= 3 of x
then x =20,000

Q: What is the ratio of 18 minutes to one hour ? 2240 0

  • 1
    1/5
    Correct
    Wrong
  • 2
    3/4
    Correct
    Wrong
  • 3
    1/7
    Correct
    Wrong
  • 4
    3/10
    Correct
    Wrong
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Answer : 4. "3/10"
Explanation :

Answer: D) 3/10 Explanation: One hour = 60 min 18/60 = 3/10

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