time

[CITI29]

If it is 6:27 in the evening on a certain day, what time
in the morning was it exactly 2,880,717 minutes
earlier? (Assume standard time in one location.)

(A) 6:22
(B) 6:24
(C) 6:27
(D) 6:30
(E) 6:32

Can someone pls advise how to quickly solve this question?

[reachac]

Is the answer B?

wana c if the stratergy worked?

[sudhir3127]

Answer D..sorry for the typo..

here goes the explanation..

2,880,717 mints ago .

u have to find the nearest multiple of 60 ( 60 for 60 mints in a hour) which is near 2,880,717 .

60* 48012 ( easy to find as you find the number which divisible by 6)
= 2,880, 720. this is 3 mints ahead of the given question.

hence the number should be 6:27 + 3 mints = 6:30.

hope this helps.let me know if u still need any clarification

[CITI29]

corect answer is 'd'...any explanation?

[sudhir3127]

Answer is D,

here goes the explanation..

2,880,717 mints ago .

u have to find the nearest multiple of 60 ( 60 for 60 mints in a hour) which is near 2,880,717 .

60* 48012 ( easy to find as you find the number which divisible by 6)
= 2,880, 720. this is 3 mints ahead of the given question.

hence the number should be 6:27 + 3 mints = 6:30.

hope this helps.let me know if u still need any clarification

[raunekk]

sudhir3127,

Can you please add a few steps between..

60* 48012 ( easy to find as you find the number which divisible by 6)
= 2,880, 720. this is 3 mints ahead of the given question.
.
.
.
..
.
.
.

hence the number should be 6:27 + 3 mints = 6:30.

thanks.

[CITI29]

Hey thanks for the explanation...

but sorry I dont understand it ...is there any other way to solve this?

[sudhir3127]

here it goes..

All one has to do in this problem is find a multiple of 60 ( 60 is standard for 60 mints in an hour ) which nearer to
2,880, 717.. which 48012 ( i arrived @ that by finding multiple of 6)

60mints * 48012 mints = 2,880,720 mints . which 3 mints ahead of what the question has asked.

hence the answer would be 6:27 + 3 mints = 6:30

[reachac]

@ sudhir, If to make a multiple of 60, u added 3 to the original figure of 2,880, 717. Then whille arriving at the ans, dont u ave to subtract 3 instead. leaving the ans to be 6:27- 3 min = 6:24??

[sudhir3127]

hey my understanding was suppose.

if the time now is 6'30 and u add up 2,880,720. u will get 6.30 in future as well. but we have to add up only 6,880,717 .hence this will take u to 3 mints less which 6.30 - 3 mints = 6.27 ( which is in the question).

let me know if am wrong in interpreting?

[raunekk]

i am not getting it..

[reachac]

Ohhh what the heck, we are actually moving backwards in time. Thanks dude ur explaination helped.

[raunekk]

gawd!!!i was taking mins as seconds....


thanks sudhir3127

[parallel_chase]

If it is 6:27 in the evening on a certain day, what time
in the morning was it exactly 2,880,717 minutes
earlier? (Assume standard time in one location.)

(A) 6:22
(B) 6:24
(C) 6:27
(D) 6:30
(E) 6:32

Can someone pls advise how to quickly solve this question?

The answer is D

Method:

if we have to calculate time 10 minutes before 6:27, it will be 6:17

Similarly,

if 5 minutes, then 6:22
if 15 minutes, then 6:12
if 25 minutes, then 6:02,


Therefore we only have to look at the unit digit to find the answer.

The unit digit is 7, any option with 0 at the end will be the answer.

Hence D.

Let me know if you still have any doubts.

[CITI29]

Thanks a ton....!!