@Exodia said:Find the remainder (30^72)^87 is divided by 11.
4 ?
(30^72)^87 = 30^6264 mod 11
E(11) = 10
so...30^4 mod 11 = 8^4 mod 11 = 64*64 mod 11 = 9*9 mod 11 = 81 mod 11 = 4.....
Find the remainder (30^72)^87 is divided by 11.
OA: 5 . Plz can anybody explain it.
@mailtoankit @joyjitpal
OA: 5 . Plz can anybody explain it.
@mailtoankit @joyjitpal
@iLoveTorres said:i am getting the answer 220/9
i've posted the method.
please check ur calculations again.
please check ur calculations again.
@bs0409 said:OA-0Mr. X leaves his house daily at a particular time to go to his office. He reaches office 10 minutes late when he travels at 20 kmph and 5 minutes early when he travels at 30kmph. At what speed should he travel to reach office on time.
bhai answer kya hai iska?
@Exodia said:Find the remainder (30^72)^87 is divided by 11.
(30^72)^87 = 30^6264
Now 30^anything div by 11 follows the pattern of remainders as in
(8,9,6,4,10,3,2,5,7,1) , (8,9,...............................)....ie it repeats in interval of 10
Now 30^6264= 30^6260. 30^4
R= 1. 4
= 4
@Exodia said:Find the remainder (30^72)^87 is divided by 11. OA: 5 . Plz can anybody explain it.@mailtoankit@joyjitpal
If it is 30^72^87 then it will be 5. But in the case of (30^72)^87 it will be 4 I think.
regards
scrabbler
regards
scrabbler
@scrabbler said:If it is 30^72^87 then it will be 5. But in the case of (30^72)^87 it will be 4 I think.regardsscrabbler
oh noted the difference 
@scrabbler said:If it is 30^72^87 then it will be 5. But in the case of (30^72)^87 it will be 4 I think.regardsscrabbler
i rechecked....if it is (30^72) ^ 87, R =4
if it is 30^72^87, R = 5
@Exodia kindly check ur question :)
@Exodia said:Find the remainder (30^72)^87 is divided by 11. OA: 5 . Plz can anybody explain it.@mailtoankit@joyjitpal
it should be -> 30^72^87%11
72^87%10 = (2^10)^8*2^7 = 76*2^7 = 8..
=> (-3)^8%11 = 9^4%11 = (-2)^4%11 = 16%11 = 5...
@scrabbler said:If it is 30^72^87 then it will be 5. But in the case of (30^72)^87 it will be 4 I think.regardsscrabbler
It is 30^72^87. Missed the difference between 30^72^87 and (30^72)^87.
@Exodia said:It is 30^72^87. Missed the difference between 30^72^87 and (30^72)^87.
Have made that error, more than once 
Happens!
regards
scrabbler
Happens!regards
scrabbler
In an isosceles right angled triangle ABC, it is given that AB = BC. DE and GF are drawn parallel to BC and AB respectively such that DE as well as GF divide the triangle ABC into two equal parts. BO when extended meets AC at the point H. Find the ratio BO : OH.
Another problem on remainders:
Find the remainder when 10^10 + 10^100 + ......... 10^10000000000 is divided by 7:
1) 0
2) 1
3) 2
4) 5
@mohitjain said:In an isosceles right angled triangle ABC, it is given that AB = BC. DE and GF are drawn parallel to BC and AB respectively such that DE as well as GF divide the triangle ABC into two equal parts. BO when extended meets AC at the point H. Find the ratio BO : OH.
...rt2:1 hai kya? Painful calculation :(
regards
scrabbler
regards
scrabbler
@Exodia said:Find the remainder (30^72)^87 is divided by 11. OA: 5 . Plz can anybody explain it.@mailtoankit@joyjitpal
it's coming 4. r u sure it's 5? :(
@Exodia said:Another problem on remainders:Find the remainder when 10^10 + 10^100 + ......... 10^10000000000 is divided by 7:1) 02) 13) 24) 5
5? I think each term is giving 4 separately. So 10 terms give 40 and 40/7= 5
regards
scrabbler
regards
scrabbler
@ChirpiBird said:it's coming 4. r u sure it's 5?
Its 4 for the question stated. The actual question was 30^72^87. In that case answer is 5
@scrabbler said:5? I think each term is giving 4 separately. So 10 terms give 40 and 40/7= 5regardsscrabbler
OA: 5 
@ChirpiBird said:it's coming 4. r u sure it's 5?
Its 4 for the question stated. The actual question was 30^72^87. In that case answer is 5