Number System - Questions & Discussions

what is the remainder of 7^7^7/13 ???

orangejawan Says
what is the remainder of 7^7^7/13 ???

e(13)= 12

so 7^7/12 gives remainder 7

so given can b written as 7^(12k+7)

7^(12k+7)/13= 7^7/13

is the remainder 6?

Hi, Vivek , i did't understood the why are we dividing it with 12 ( 7^7/12) ?? Please explain the problem in detail

Yes answer is 6

Hi, Vivek , i did't understood the why are we dividing it with 12 ( 7^7/12) ?? Please explain the problem in detail

Yes answer is 6



euler of 13 is =12
( u know euler rule? )
then it simplifies and we can proceed .
if u want euler rule , i will upload it
Hi, Vivek , i did't understood the why are we dividing it with 12 ( 7^7/12) ?? Please explain the problem in detail

Yes answer is 6

euler number for 13 is 12

by euler theorem a^e mod x is 1
where e is euler number for x

hence he is dividing 7^7 by 12

Hope you got the point

yes i have read the euler rule ... 7^12/13 =1 , but the next step of dividing by 12 , please explain that

Hi, Vivek , i did't understood the why are we dividing it with 12 ( 7^7/12) ?? Please explain the problem in detail

Yes answer is 6


Lal Jawan..or orange one...hehe...well this theorem is called the EULER theorem...well in simple words let me explain....

7^1 mod 13 = 7
7^2 mod 13 = 10
7^3 mod 13 = (7^2 mod 13) *(7^1 mod 13) = 5
7^4 mod 13 = (7^3 mod 13) *(7^1 mod 13) = 9
7^5 mod 13 = (7^4 mod 13) *(7^1 mod 13) = 11
7^6 mod 13 = (7^5 mod 13) *(7^1 mod 13) = 12 or -1...

so 7^12 mod 13 = (7^6 mod 13) *(7^6 mod 13) = 1...

so after every 12 cycles remainder would be 1.....

now power is 7^7...so we have to take its mod by 12...
which is 7^7 mod 12 = 7....so we'll search for 12k+7...which gives us remainder 6.....
orangejawan Says
yes i have read the euler rule ... 7^12/13 =1 , but the next step of dividing by 12 , please explain that


I'll take a try @ dis..
u no..euler of 13=12..
now remaindr(7^12/13)=1..
so
7^7(i.e. the power of denominator 7 ) has to be expressed as a factor of 12.
so next step is to find rem(7^7/12)
we get it as 7
thus 7^7=12k+7
thus given expression=7^(12k+7)/13
7^12k/13=1
thus we nid to find only remaindr(7^7/13)
rem=6 (ans)
answer is 36..i think....

Layer 1 = 1 ball
Layer 2 = 1+2 balls
Layer 3 = 1+2+3 balls
Layer 4 = 1+2+3+4...so on...

Layer n = 1+2+3+4+...+(n-1)+n.

so n*1 + (n-1)*2 + (n-2)*2 + .... + (n-1)*2 + n = 8436....

so n = 36..

tn term will be n(n+1)/2
sum of tn terms will be
n(n+1)(n+2)/6 = 8436

solving n=36


explain the bold section, how did you puys arrived this??
Sahana Kavitha Says
explain the bold section, how did you puys arrived this??



s=1+3+6+.......................................tn---------------1
s= 1+3+6+.......................................tn---------------2

1-2=>
tn=1+2+3+.............................n
tn=n(n+1)/2

and sigma tn will b n(n+1)(n+2)/6


hope i m clear!

Every ceiling, when reached, becomes a floor

What is the reamainder of 38! / 41 ?

What is the general method of solving the question like : find the last three digits of 3^1994 ???

orangejawan Says
What is the reamainder of 38! / 41 ?


by wilsons theorm i m gettin answer as 2
is it correct?


Every ceiling, when reached, becomes a floor
find the remainder when (38^16!)^1777 is divided by 17

a. 1
b. 16
c. 8
d. 13


what do you mean by " ^ "
sanjeev-garg Says
what do you mean by " ^ "


find the remainder when (38^16!)^1777 is divided by 17

"^" means to the power of.

16!^1777 can be expressed as 16k

17 and 38 are comprime

So 38^16kmod 17 =1
by wilsons theorm i m gettin answer as 2
is it correct?


Every ceiling, when reached, becomes a floor


Not sure about the answer , pleaase explain the method too ???

Problem is easy but what is the answer for this ???
if A=33*32*31*30*29*28
&
if Remainder [ A/(12k)] = 0......then find the minimum value of k

will an body tell me what does this mean
^

thanks yaar raja ram varun