Quantitative Interview Questions & Answers  Learning Mode

Try
Quantitative Interview Questions & Answers  Exam Mode

Question: If Log2 x  5 Log x + 6 = 0, then what would the value / values of x be?
Answer:
x = e2 or e3
Source: CoolInterview.com

Question: Divide 45 into four parts such that when 2 is added to the first part, 2 is subtracted from the second part, 2 is multiplied by the third part and the fourth part is divided by two, all result in the same number.
Answer:
8, 12, 5, 20Explanation: a + b + c + d =45; a+2 = b2 = 2c = d/2; a=b4; c = (b2)/2; d =2(b2); b4 + b + (b2)/2 + 2(b2) = 45;.
Source: CoolInterview.com

Question: A software engineer has the capability of thinking 100 lines of code in five minutes and can type 100 lines of code in 10 minutes. He takes a break for five minutes after every ten minutes. How many lines of codes will he complete typing after an hour?
Answer:
250 lines of codes.
Source: CoolInterview.com

Question: There are two candles of equal lengths and of different thickness. The thicker one lasts of six hours. The thinner 2 hours less than the thicker one. Ramesh lights the two candles at the same time. When he went to bed he saw the thicker one is twice the length of the thinner one. How long ago did Ramesh light the two candles?
Answer:
3 hours
Source: CoolInterview.com

Question: What is a percent of b divided by b percent of a?
Answer:
1Explanation:a percent of b : (a/100) * bb percent of a : (b/100) * aa percent of b divided by b percent of a : ((a / 100 )*b) / (b/100) * a )) = 1.
Source: CoolInterview.com

Question: If on an item a company gives 25% discount, they earn 25% profit. If they now give 10% discount then what is the profit percentage.
Answer:
30%.
Source: CoolInterview.com

Question: A man was engaged on a job for 30 days on the condition that he would get a wage of Rs. 10 for the day he works, but he have to pay a fine of Rs. 2 for each day of his absence. If he gets Rs. 216 at the end, he was absent for work for ... days.
Answer:
7 daysExplanation:The equation portraying the given problem is:10 * x  2 * (30  x) = 216 where x is the number of working days.Solving this we get x = 23Number of days he was absent was 7 (3023) days..
Source: CoolInterview.com

Question: A dishonest shopkeeper professes to sell pulses at the cost price, but he uses a false weight of 950gm. for a kg. His gain is____%.
Answer:
5.3 %Explanation:He sells 950 grams of pulses and gains 50 grams.If he sells 100 grams of pulses then he will gain (50 / 950) *100 = 5.26.
Source: CoolInterview.com

Question: The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?
Answer:
40 Years
Source: CoolInterview.com

Question: Three cards are drawn at random from an ordinary pack of cards. Find the probability that they will consist of a king, a queen and an ace.
Answer:
64/2210
Source: CoolInterview.com

Question: There are 3 persons Sudhir, Arvind, and Gauri. Sudhir lent cars to Arvind and Gauri as many as they had already. After some time Arvind gave as many cars to Sudhir and Gauri as many as they have. After sometime Gauri did the same thing. At the end of this transaction each one of them had 24. Find the cars each originally had.
Answer:
Sudhir had 39 cars, Arvind had 21 cars and Gauri had 12 cars.Explanation:Sudhir Arvind GauriFinally 24 24 24Before Gauri?s transaction 12 12 48Before Arvind?s transaction 6 42 24Before Sudhir? s transaction 39 21 12.
Source: CoolInterview.com

Question: A rectangular plate with length 8 inches, breadth 11 inches and thickness 2 inches is available. What is the length of the circular rod with diameter 8 inches and equal to the volume of the rectangular plate?
Answer:
3.5 inchesExplanation : Volume of the circular rod (cylinder) = Volume of the rectangular plate (22/7)*4*4*h = 8*11*2, h = 7/2 = 3.5.
Source: CoolInterview.com

Question: A boy has Rs 2. He wins or loses Re 1 at a time If he wins he gets Re 1 and if he loses the game he loses Re 1. He can loose only 5 times. He is out of the game if he earns Rs 5. Find the number of ways in which this is possible?
Answer:
16.
Source: CoolInterview.com

Question: A worker is paid Rs.20/ for a full days work. He works 1,1/3,2/3,1/8.3/4 days in a week. What is the total amount paid for that worker ?
Answer:
57.50.
Source: CoolInterview.com

Question: Five farmers have 7, 9, 11, 13 & 14 apple trees, respectively in their orchards. Last year, each of them discovered that every tree in their own orchard bore exactly the same number of apples. Further, if the third farmer gives one apple to the first, and the fifth gives three to each of the second and the fourth, they would all have exactly the same number of apples. What were the yields per tree in the orchards of the third and fourth farmers?
Answer:
11 & 9 apples per tree.Explanation:Let a, b, c, d & e be the total number of apples bored per year in A, B, C, D &E ?s orchard. Given that a + 1 = b + 3 = c  1 = d + 3 = e  6But the question is to find the number of apples bored per tree in C and D ?s orchard.If is enough to consider c  1 = d + 3.Since the number of trees in C?s orchard is 11 and that of D?s orchard is 13.Let x and y be the number of apples bored per tree in C & d ?s orchard respectively.Therefore 11 x  1 = 13 y + 3By trial
Source: CoolInterview.com

Question: A certain type of mixture is prepared by mixing brand A at Rs.9 a kg. with brand B at Rs.4 a kg. If the mixture is worth Rs.7 a kg., how many kgs. of brand A are needed to make 40kgs. of the mixture?
Answer:
Brand A needed is 24kgs
Source: CoolInterview.com

Question: Five boys were climbing a hill. J was following H. R was just ahead of G. K was between G & H. They were climbing up in a column. Who was the second?
Answer:
G.Explanation:The order in which they are climbing is R  G  K  H  J.
Source: CoolInterview.com

Question: If a light flashes every 6 seconds, how many times will it flash in ? of an hour?
Answer:
451 times.Explanation:There are 60 minutes in an hour.In ? of an hour there are (60 * ?) minutes = 45 minutes.In ? of an hour there are (60 * 45) seconds = 2700 seconds.Light flashed for every 6 seconds.In 2700 seconds 2700/6 = 450 times.The count start after the first flash, the light will flashes 451 times in ? of anhour..
Source: CoolInterview.com

Question: If PQRST is a parallelogram what it the ratio of triangle PQS & parallelogram PQRST
Answer:
1:2.
Source: CoolInterview.com

Question: A cylindrical container has a radius of eight inches with a height of three inches. Compute how many inches should be added to either the radius or height to give the same increase involume?
Answer:
16/3 inchesExplanation : Let x be the amount of increase. The volume will increase by the same amount if the radius increased or the height is increased. So, the effect on increasing height is equal to the effect on increasing the radius.i.e., (22/7)*8*8*(3+x) = (22/7)*(8+x)*(8+x)*3Solving the quadratic equation we get the x = 0 or 16/3. The possible increase would be by 16/3 inches..
Source: CoolInterview.com
