Here in this blog , we are discussing about ADF – Interview Aptitude Questions with some basic examples . Some of them are :

1. What is the minimum number of square marbles required to the floor of length 5m 78 cm and width 3m 74cm.

SOLUTION :
Length = 5m 78cm = 578cm
Breadth = 3m 74cm = 374cm

LCM of 578 and 374 = 6358
HCF of 578 and 374 = 34

Required minimum number of tiles = 6358 / 34

Required minimum number of tiles = 187
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2. Find the degree of the clock hand 2 hours and 40 minutes

SOLUTION :
Angle traced by the clock hand in 24 hours = 360 degree
Angle traced by it in 2 hours 40 minutes ie) 8/3 hours

= 360/12 * 8/3

= 10 * 8 = 80 degrees

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3. How many times a day clock hand coincide with each other ?

SOLUTION:
The hands of a clock coincide 11 times in every 12 hours.

( Since between 11 and 1 they coincide only once ie) at 12 o’clock)
Hence they coincide with each other 22 times in a day.
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4. If Rs. 100 is doubled in compound in 5 years then how many years would it take to another Rs. 200 ?

SOLUTION :

Principal amount = Rs.100
Compound interest = Rs. 100
Time = 5 years

Rate % =   Compound Interest * 100                   100 * 100
————————————— =         ————- = 20 %
Principal * Time                                       100 * 5

=> Rate = 20 %

Hence the new principal = Rs.100 , rate = 20 % and the time = x years

Time = Compound Interest * 100                   100 * 100
——————————-                 = ————- = 5 years
Principal * rate                                    100 * 20

Hence after 5 years the principal amount gets twice in its share

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