Quantitative Aptitude Practice Question and Answer
8Q: The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age og the youngest child ? 1879 05b5cc718e4d2b4197774f49a
5b5cc718e4d2b4197774f49a- 18 yrsfalse
- 216 yrsfalse
- 36 yrsfalse
- 44 yrstrue
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Answer : 4. "4 yrs"
Explanation :
Answer: D) 4 yrs Explanation: Let the age of the youngest child is 'X' years.Then the child elder than the yongest is 'X + 3' yrsSince each have 3yrs difference upto 5 childrenAnd given that=> X + X+3 + X+6 + X+9 + X+12 = 50=> 5X + 30 = 50=> X = 4 yrs.
Q: The cost price of 40 Magazines is the same as the selling price of 'P' articles. If the profit is 25%, then the value of 'P' is: 1878 05b5cc76ae4d2b4197774fe4f
5b5cc76ae4d2b4197774fe4f- 132true
- 240false
- 316false
- 430false
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Answer : 1. "32"
Explanation :
Answer: A) 32 Explanation: Let C.P. of each Magazine be Rs. 1 C.P. of P articles = Rs. P. S.P. of P articles = Rs. 40. Profit = Rs. (40 - P) Now, Gain% = ProfitC.P×100 = 40-PP×100 Here 40-PP×100= 25 -->P = 32.
Q: A rectangular lawn of dimensions 80 m x 60 m has two roads each 10 m wide running in the middle of the lawn, one parallel to the length and the other parallel to the breadth. What is the cost of traveling the two roads at Rs.3 per sq m ? 1878 05b5cc6eee4d2b4197774ef1b
5b5cc6eee4d2b4197774ef1b- 1Rs. 3600false
- 2Rs. 3800false
- 3Rs. 3900true
- 4Rs. 3700false
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Answer : 3. "Rs. 3900"
Explanation :
Answer: C) Rs. 3900 Explanation: Area = (l + b – d) d = (80 + 60 – 10)10 => 1300 sq.mts => 1300 x 3 = Rs.3900
Q: The average age of Vishal and Raghavendra is 24 years. If a new person Veerender is also included, the average age is increased by 1.5 years. What is the age of Veerender? 1878 05b5cc69de4d2b4197774c897
5b5cc69de4d2b4197774c897- 128.5 yrstrue
- 229.5 yrsfalse
- 330.5 yrsfalse
- 427 yrsfalse
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Answer : 1. "28.5 yrs"
Explanation :
Answer: A) 28.5 yrs Explanation: According to the given data, (V + R)/2 = 24 Now, after joining of Veerender, V + R + D)/3 = 25.5 Hence, Veerender Age = 3(25.5) - 2(24) = 76.5 - 48 = 28.5 years.
Q: The length of two superfast trains are 140 mts and 160 mts respectively. If they run at the speed of 60 km/hr and 80 km/hr respectively in opposite direction, find the time in which they will cross each other ? 1878 05b5cc6cde4d2b4197774e1ae
5b5cc6cde4d2b4197774e1ae- 17.71 sectrue
- 210.48 secfalse
- 39.36 secfalse
- 48.45 secfalse
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Answer : 1. "7.71 sec"
Explanation :
Answer: A) 7.71 sec Explanation: Given L1 = 140 m L2 = 160 m S1 = 60 km/hr S2 = 80 km/hr From the question we get, S1 + S2 = (L1 + L2) / T => (60 + 80) 5/18 m/s = 140 + 160/T => T = 54/7 = 7.71 sec
Q: It was Tuesday on Jan 1, 2006. What was the day of the week Jan 1, 2010 ? 1877 05b5cc6d0e4d2b4197774e367
5b5cc6d0e4d2b4197774e367- 1Sundayfalse
- 2Fridaytrue
- 3Mondayfalse
- 4Tuesdayfalse
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Answer : 2. "Friday"
Explanation :
Answer: B) Friday Explanation: On 31st December, 2005 it was Monday. Number of odd days from the year 2006 to the year 2009 = (1 + 1 + 2 + 1) = 5 days. On 31st December 2009, it was Thursday. Thus, on 1st Jan, 2010 it is Friday.
Q: In how many ways can letter of the word RAILINGS arrange so that R and S always come together? 1877 05b5cc6b9e4d2b4197774d6a8
5b5cc6b9e4d2b4197774d6a8- 11260false
- 22520false
- 35040true
- 41080false
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Answer : 3. "5040"
Explanation :
Answer: C) 5040 Explanation: The number of ways in which the letters of the word RAILINGS can be arranged such that R & S always come together is Count R & S as only 1 space or letter so that RS or SR can be arranged => 7! x 2! But in the word RAILINGS, I repeated for 2 times => 7! x 2!/2! = 7! ways = 5040 ways.
Q: A polygon has 44 diagonals, then the number of its sides are ? 1877 05b5cc754e4d2b4197774fbb9
5b5cc754e4d2b4197774fbb9- 113false
- 29false
- 311true
- 47false
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Answer : 3. "11"
Explanation :
Answer: C) 11 Explanation: Let the number of sides be n. The number of diagonals is given by nC2 - n Therefore, nC2 - n = 44, n>0 nC2 - n = 44 n2 - 3n - 88 = 0 n2 -11n + 8n - 88 = 0 n(n - 11) + 8(n - 11) = 0 n = -8 or n = 11. As n>0, n will not be -8. Therefore, n=11.