Latest TCS Aptitude Question SOLUTION: Q1. At 6 o’ clock, a clock ticks 6 times. The time between first and last tick is 30 seconds. How long does it tick at 12 o\' clock ? 1) 66 secs 2) 60 secs 3) 72

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Q1. At 6 o’ clock, a clock ticks 6 times. The time between first and last tick is 30 seconds. How long does it tick at 12 o' clock ?

1) 66 secs
2) 60 secs
3) 72 secs
4) 65 secs

Q2. A cube is painted red on two adjacent faces and on one opposite face, yellow on two opposite faces and green on the remaining face. It is then cut in to 64 equal cubes.
Q. How many cubes have only one red colored face ?

1) 4
2) 8
3) 12
4) 16

Asked In TCS ravikiran (10 years ago)

Solved s.krishna kumar Read Solution (11)

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Read Solution (11) :

s.krishna kumar  (10 years ago)

1tick = 30/5 = 6secs
11 ticks(excluding the first tick)= 11*6 =66 secs

Is this solution Helpfull? Yes (36) | No (1)  

Raavi Dileep Veera Kumar  (10 years ago)

total 3 faces are of red
so formula for 6 phases painted same color is 6(n-2)^2
so now 3 phases are painted red so 3(n-2)^2
hence n=4(bcoz 4*4*4=64)
so 3(4-2)^2=12

Is this solution Helpfull? Yes (17) | No (5)  

kulwant singh  (10 years ago)

1> After first tick time will start so 1..2..3..4..5..6 so there are 5gaps for which time will be consumed . so for 1..2 it will take 6sec.
so for at120clock it will take 11*6=66

Is this solution Helpfull? Yes (8) | No   

Sanjib Biswas  (10 years ago)

16(Ans)
Total no. of cube (1 face colored )=6*4 (where 6 is no. of side)=24
now yellow cube 1 faced is 8.
So remaining (24-8)=16 cube have only 1 face red color.

Is this solution Helpfull? Yes (3) | No (3)  

nitu kaware  (10 years ago)

60 sec
as 30 sec for 6 ticks
so 1tick =5sec
so 12ticks=5*12sec

Is this solution Helpfull? Yes (2) | No (17)  

janki  (8 years ago)

At 6'o clock ticks 6 times means 5 interval
and also given that time b/w first and last tick is 30 sec.
so
30/5=6
i.e time of each interval is 6 sec.

Similarly at 12'o clock, clock ticks 12 times i.e 11 interval
so
1 interval time=6
so 11 interval=11*6
Answer=66 sec

Is this solution Helpfull? Yes (1) | No   

sanju  (10 years ago)

anyone expln in shortcut mthd for both prblms plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

Is this solution Helpfull? Yes | No   

D Sri Ram  (10 years ago)

The cuboid to be formed according to the given conditions consists of 16 small symmetric faces(4*4).
Total no. of red faced cubes are 40. The number cubes that are edge of the two adjacent red surfaces are 4. But, we have 2 such edges. Hence, total number of double red faced cubes are 8.
Hence, the no of red cubes which have red on only one face are= 40-8, i.e. 32

Is this solution Helpfull? Yes | No (2)  

ANUPAM YADAV  (9 years ago)

If que is how many cubes are there with only red color faces-Ans is 16
Ans if the que is how many cubes are there having one red face-ans is 32

Is this solution Helpfull? Yes | No (1)  

hariharan  (8 years ago)

the formula for finding only one face painted is (n-2)^2 x 6
So there fore 24 cubes painted on only one face
out of 6 faces 3 faces painted with red. 2 with yellow and 1 with green
so out of 24 only one face painted cube 12 are painted only with red colour

Is this solution Helpfull? Yes | No (1)  

Vaishnavi Battuwar  (3 years ago)

1tick = 30/5=6sec (5 because for 6 0 clock it takes 5 intervals)
for 12 o clock it takes 11 intervals so 11*6sec = 66sec

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