Unit digit of 2^51......

• Answer is 8
  2^1=2
  2^2=4
  2^3=8
  2^4=16
  2^5=32
  2^6=64
  since unit digit repeat after 4th power.
  hence 51/4=get reminder 3.
  therefore answer is 2^3=8.
• 9 years agoHelpfull: Yes(23) No(0)
• 2^1=2
  2^2=4
  2^3=8
  2^4=16
  2^5=32
  2^6=64
  repeated pattern of last digit=2,4,6,8,2,4,6,8,.......
  51/4 remiander 3
  so
  2^51=2^3=8
  
• 9 years agoHelpfull: Yes(3) No(1)
• Answer is 8
• 9 years agoHelpfull: Yes(2) No(1)
• Answer is 8
• 9 years agoHelpfull: Yes(1) No(1)
• as the unit digit repeat after every 4th power.
  so 51/4=get reminder 3.
  therefore answer is 2^3=8.
  
• 9 years agoHelpfull: Yes(1) No(0)
• (2^4)^12*2^3= 2^3= 8
• 9 years agoHelpfull: Yes(0) No(0)
• 2
  because the unit digit of the number will be the ans and here it is 2
• 7 years agoHelpfull: Yes(0) No(2)