Quantitative Aptitude Practice Question and Answer
8Q: A,B,C,D,E,F,G and H are sitting around a circular table facing the centre but not necessarily in the same order. G sits third to the right of C. E is second to the right of G and 4th to the right of H. B is fourth to the right of C. D is not an immediate neighbour of E. A and C are immediate neighbours. Which of the following is/are correct ? 1586 05b5cc6c5e4d2b4197774dd46
5b5cc6c5e4d2b4197774dd46- 1F is third to the left of Bfalse
- 2F is second to the right of Btrue
- 3B is an immediate neighbour of Dfalse
- 4All of the abovefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "F is second to the right of B"
Explanation :
Answer: B) F is second to the right of B Explanation: From the given information, the circular arrangement is Here F is second to the right of B and the remaning all are wrong.
Q: Consider 5 independent Bernoulli’s trials each with probability of success p. If the probability of at least one failure is greater than or equal to 31/32 , then p lies in the interval ? 1584 05b5cc71ee4d2b4197774f5c7
5b5cc71ee4d2b4197774f5c7- 1[1, 32]false
- 2(0, 1)false
- 3[1, 1/2]true
- 4(1, 1/2]false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "[1, 1/2]"
Explanation :
Answer: C) [1, 1/2] Explanation: Probability of atleast one failure= 1 - no failure > 31/32= 1 - P5 > 31/32= P5<1/32= p < 1/2Also p > 0Hence p lies in [0,1/2].
Q: What is the difference between the number of uneducated females in city P and that of uneducated males in city S ? 1581 05b5cc6c8e4d2b4197774df37
5b5cc6c8e4d2b4197774df37- 19 lakhstrue
- 26 lakhsfalse
- 33 lakhsfalse
- 42 lakhsfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "9 lakhs"
Explanation :
Answer: A) 9 lakhs Explanation: Educated females in city P = 25 lakhs Uneducated females in city P = 30 - 25 = 5 lakhs Educated males city S = 21 lakhs Educated males in city S = 35 - 21= 14 lakhs Required difference = 14 - 5 = 9 lakhs
Q: A train 900 m long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 min, then the length of the tunnel is ? 1577 05b5cc6dce4d2b4197774e99c
5b5cc6dce4d2b4197774e99c- 1400 mtrue
- 2300 mfalse
- 3500 mfalse
- 4600 mfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "400 m"
Explanation :
Answer: A) 400 m Explanation: Speed = 78 x 5/18 = 65/3 m/sec.Time = 1 min = 60 sec.Let the length of the train be x meters.Then, (900 + x)/60 = 65/3x = 400 m.
Q: The sum of the two digits of a number is 8. If the number is subtracted from the number obtained by reversing its digits, the result is 54. Find the number ? 1577 05b5cc6f8e4d2b4197774f072
5b5cc6f8e4d2b4197774f072- 128false
- 219false
- 337false
- 417true
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "17"
Explanation :
Answer: D) 17 Explanation: Any two digit number can be written as (10P + Q), where P is the digit in the tens place and Q is the digit in the units place.P + Q = 8 ----- (1)(10Q + P) - (10P + Q) = 549(Q - P) = 54(Q - P) = 6 ----- (2)Solve (1) and (2) P = 1 and Q = 7The required number is = 17
Q: A sequence of natural number 2,3,5,6,10. Such that no square and no cube occurs in the term. Find the 300th term of sequence ? 1574 05b5cc709e4d2b4197774f29e
5b5cc709e4d2b4197774f29e- 1322false
- 2319false
- 3321false
- 4320true
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "320"
Explanation :
Answer: D) 320 Explanation: 1 to 300 = 300 numbers squares btwn 1 to 300 = 1,4,9,16,25,36,49.....289 i.e, total 17cubes = 1,8,27,64,125,216 i.e, 5 now 1 and 64 are common so total numbers that should be removed ( 17+5-2= 20 )total 20 term removed so 300th term would be 320
Q: If 25% of three-seventh of 26% of a number is 145.5, what is the number? 1572 05b5cc6bfe4d2b4197774d9f1
5b5cc6bfe4d2b4197774d9f1- 14987false
- 25784false
- 35223true
- 44741false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "5223"
Explanation :
Answer: C) 5223 Explanation: Given, 25% of three-seventh of 26% of a number is 145.5 Let the required number be 'N' i.e, 25100x37x26100xN = 145.5 N = 145.5x7x1000075x26 => N = 5223.07
Q: A number is 2 more than thrice the second number and 4 times the smaller number is 5 more than the greater number. What is greater number ? 1572 05b5cc6c9e4d2b4197774df9c
5b5cc6c9e4d2b4197774df9c- 17false
- 223true
- 39false
- 421false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "23"
Explanation :
Answer: B) 23 Explanation: Let the greater and smaller number be p and q respectively. 4q = p + 5 ------ (I) p = 3q+2 ------- (II) From equation (I) and (II) q = 7 p = 23