20th December 2008

Find the Unit digit of

127141 + 141127 + 127.141 + (127.141)127.141

*Another "Backlog" Question of the day!

10 Answers

1
Akand ·

is the answer 4???

11
Anirudh Narayanan ·

8 ?

62
Lokesh Verma ·

Yes it is 8 aragon..

Could you give the explanation for the more mortal ones ;)

341
Hari Shankar ·

8!!?? how on earth? I thought it is exactly divisible

1
Akand ·

for 127141.......d unit digit is 7....
for 141127.......d unit digit is 1....
for 127.141................d unit digit is 7
and for d last one it is ....................9 so d sum's unit digit is 4...
..wats wrong wid this???

11
Anirudh Narayanan ·

(127)141 ends with 7 as 141= 4(35) + 1 and 74n+1 ends with 7.
141127 ends with 1.
127.141 ends with 7 and
(127.141)127.141= (17907)17907 ends with 3 as 74n+3 ends with 3.
So sum ends with unit place of 7+1+7+3 which is 8.

P.S:
Cut the mortal immortal stuff, bhaiyyah. pls

62
Lokesh Verma ·

akand.. you messed only with the last part

341
Hari Shankar ·

sorry messed that. apologies if i have caused confusion :(

62
Lokesh Verma ·

Nothing to apologize dude :)

I have made mistakes here.. But then it is a learning process for all of us :)

62
Lokesh Verma ·

@ Aragon: I din say u are immortal. I said that some others were more mortal ;) [6]

Your Answer

Close [X]