unidigit of4^5^6^7^8^9

• 4^(5^6^7^8^9)
  
  = 4^(odd no.) [5^6^7^8^9 = odd no.]
  gives unit digit 4.
  
• 10 years agoHelpfull: Yes(21) No(10)
• 6 is the ans
  4^1=4
  4^2=16
  4^3=64
  so the last digit of 4 to power something repeats after 2 cycle
  4^5last digit=4
  4^6 last digit would be 6
  6 repeats its last digits
  so the ans is 6
• 10 years agoHelpfull: Yes(19) No(1)
• 6
  4^5 = 4
  4^6 = 6
  6^7 = 6
  6^8 = 6
  6^9 = 6
• 10 years agoHelpfull: Yes(6) No(0)
• answer is 4.
  what ever may be the power of 5 but the unit digit will be 5, so
  4^5 =1024
  unit digit is 4.
• 10 years agoHelpfull: Yes(5) No(1)
• power of 4 is even ,due to 4*5*6*7*8*9=even 60480,, so 4^ even unit digit always 6 so ans without hesitation is 6
• 10 years agoHelpfull: Yes(2) No(0)
• answer is 6
  power is even 6
  power is odd 4
  
  
  
• 10 years agoHelpfull: Yes(0) No(1)
• unit digit 4^oddNo =4 so answer is 4
• 10 years agoHelpfull: Yes(0) No(1)
• answer is definitely 6 as i m from sadhaura i never speak lie see we can write it as (5*6*7*8*9) is an even number with last digit zero so 4 ki power even ki last digit is always 6
• 10 years agoHelpfull: Yes(0) No(0)
• 4^15120=4^4*3780
  or 4^4n
  so unit digit will be 6
• 10 years agoHelpfull: Yes(0) No(0)