Aptitude test for MCA interview - Set 2

1)   2 successive discounts with the first being 20%, were given on a table having marked price of Rs. 6400. Finally it was sold for Rs. 4608. How much was the 2nd discount?

a. 20%
b. 10%
c. 5%
d. 25%
Answer  Explanation 

ANSWER: 10%

Explanation:
discount


2)   What will be angle between the two hands of a clock at 10.25 pm?

a. 120°
b. 146.5°
c. 162.5°
d. 126.45°
Answer  Explanation 

ANSWER: 162.5°

Explanation:
clocks


3)   At what time after 9 am, do hands of clock make a right angle?

a. At 32(8/11) minutes past 9 am
b. At 9 am
c. At 3 pm
d. At 29(8/11) minutes before 10 am
Answer  Explanation 

ANSWER: At 32(8/11) minutes past 9 am

Explanation:
clocks


4)   Average of 3 numbers is 87. The 1st number is 4 times the 2nd number and 5 times the 3rd number. What will be difference between first and third number?

a. 99
b. 144
c. 132
d. 169
Answer  Explanation 

ANSWER: 144

Explanation:
problems on numbers


5)   What is increasing order of the fractions 14/17, 10/12, 6/7, 18/22?

a. 6/7, 14/17, 10/12, 18/22
b. 6/7, 10/12, 14/17, 18/22
c. 14/17, 10/12 , 6/7, 18/22
d. 18/22, 14/17, 10/12 , 6/7
Answer  Explanation 

ANSWER: 6/7, 10/12, 14/17, 18/22

Explanation:
fractions


6)   In 3 fractions when the largest fraction is divided by smallest fraction, the result 5/4 is greater than the middle fraction by 1/2. If sum of the three fractions is 2(3/12) what will be the difference between largest and smallest fraction?

a. 5/12
b. 1/6
c. 7/24
d. 7/12
Answer  Explanation 

ANSWER: 1/6

Explanation:
fractions


7)   What least number when divided by 20, 48 and 36 leaves the remainders 13, 41 and 29, respectively?

a. 720
b. 713
c. 727
d. 187
Answer  Explanation 

ANSWER: 713

Explanation:
hcf lcm


8)   If (x - 4) is the HCF of x2 - 8x + 15 and x2 - kx +1 , then what is k?

a. 8/15
b. 4
c. 5
d. 15/8
Answer  Explanation 

ANSWER: 4

Explanation:
hcf lcm


9)   What least number should be multiplied with 384 to make it a perfect square?

a. 3
b. 6
c. 2
d. 8
Answer  Explanation 

ANSWER: 6

Explanation:
square and cube root


10)   square and cube root

a. 8.062
b. 65
c.
d. 32.5
e. 65
Answer  Explanation 

ANSWER: 65

Explanation:
square and cube root


11)   Find value of M - 1/M, if M + 1/M = 4?

a. 32
b. 2
c. 23
d. -4
Answer  Explanation 

ANSWER: 23

Explanation:
simplification


12)   What is value of (13.8 x 1.9 รท 5.7 + 11.2 of (1/16) - (1/20))?

a. 5.50
b. 5.225
c. 55.22
d. 5.25
Answer  Explanation 

ANSWER: 5.25

Explanation:
simplification


13)   How much would be (n-m)/(n+m) , if 2.5m = 0.035n?

a. 250/493
b. 350/507
c. 7/5
d. 493/507
Answer  Explanation 

ANSWER: 493/507

Explanation:
decimals


14)   A box has 6 black, 4 red, 2 white and 3 blue shirts. What is the probability that 2 red shirts and 1 blue shirt get chosen during a random selection of 3 shirts from the box?

a. 18/455
b. 7/15
c. 7/435
d. 7/2730
Answer  Explanation 

ANSWER: 18/455

Explanation:
probability


15)   Rice and wheat are in a mixture in the ratio 5:3. If 16 kg wheat is added to this mixture, the ratio of rice to wheat changes to 5:7. How much wheat is in new mixture?

a. 21 kg
b. 28 kg
c. 42 kg
d. 35 kg
Answer  Explanation 

ANSWER: 28 kg

Explanation:
mixture


16)   M, N and P invest equally in a business. M leaves after 8 months whereas N leaves after just 5 months. Only P remains for a year. What will be ratio of profits of M, N and P respectively, if M invests Rs. 216,800?

a. 8 : 5 : 12
b. 8 : 5 : 12
c. 4 : 7 : 1
d. 8 : 5 : 12
Answer  Explanation 

ANSWER: 8 : 5 : 12

Explanation:
partnership


17)   Q invested 25% less than what R invested. Also P invested 20% more than what Q invested. What is investment of R if total investment done was Rs. 3710?

a. Rs. 1400
b. Rs. 1300
c. Rs. 1800
d. Rs. 1650
Answer  Explanation 

ANSWER: Rs. 1400

Explanation:
partnership


18)   Guddi buys some oranges in a shop at 4 per rupee. She goes to other shop and buys same number of oranges at 5 per rupee. She then combines them in a basket and sells them at 4 per rupee. Will she get a profit or loss? And how much?

a. Profit = 100/9 %
b. Loss = 100/9 %
c. Profit = 116/9 %
d. Loss = 116/9 %
Answer  Explanation 

ANSWER: Profit = 100/9 %

Explanation:
profit loss


19)   Suman buys 160 chocolates for Rs. 480. She wanted to earn 30% profit by selling them. But Rakesh visited her and she gave him 25% of those chocolates at the cost price itself. But even after doing this, she earned a profit of 30% as decided. For how much did she sell each chocolate?

a. Rs. 3.8
b. Rs. 4.2
c. Rs. 6
d. Rs. 3
Answer  Explanation 

ANSWER: Rs. 4.2

Explanation:
profit loss


20)   A bank has 6 digit account number with no repetition of digits within a account number. The first and last digit of the account numbers is fixed to be 4 and 7. How many such account numbers are possible?

a. 10080
b. 5040
c. 890
d. 1680
Answer  Explanation 

ANSWER: 1680

Explanation:
permutation combination