+0  
 
+5
817
6
avatar+1886 

What is the remainder when 3^200 is divided by 5?

A) 0

B) 1

C) 2

D) 3

E) 4

 Aug 20, 2016
edited by EighthMersennePrime  Aug 20, 2016

Best Answer 

 #4
avatar+37146 
+5

Yep.....you guests are correct....I entered the question incorrectly.   The answer IS   "B"  1

 Aug 21, 2016
 #1
avatar+37146 
+5

Answer is "A"  0

 Aug 21, 2016
 #4
avatar+37146 
+5
Best Answer

Yep.....you guests are correct....I entered the question incorrectly.   The answer IS   "B"  1

ElectricPavlov  Aug 21, 2016
 #2
avatar
+5

3^200 mod 5 = 1 or "B"

 Aug 21, 2016
 #3
avatar+9673 
+5

3^1 mod 5 = 3

3^2 mod 5 = 4

3^3 mod 5 = 2

3^4 mod 5 = 1

3^5 mod 5 = 3

3^6 mod 5 = 4

You see the sequence right?

Because 200 mod 4 = 0. 3^200 mod 5 = 3^0 mod 5 = 1. Guest #2 is correct.

 Aug 21, 2016
 #5
avatar+1886 
+21

Thanks

 Aug 21, 2016
 #6
avatar+4 
0

The answer is B

 Aug 21, 2016

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