Find units digit : (173^45) x (152^77) x (777^999)

1) 2
2) 4
3) 6
4) 8

• First we take 173^45
  pattern of power of 3 is 3,9,7,1 total 4
  when 45/4 remainder is 1
  So unit digit of 173^45=3
  Now we take 152^77
  pattern of power of 2 is 2,4,8,6 total 4
  when 77/4 remainder is 1
  So unit digit of 152^77=2
  Now we take 777^999
  pattern of power of 7 is 7,9,3,1 total 4
  when 999/4 remainder is 3
  So unit digit of 777^999=3
  Therefore units digit of multiplication is 3*2*3=8
• 11 years agoHelpfull: Yes(2) No(1)
• 2
  
  units digit of (173^45) x (152^77) x (777^999) = units digit of (3^45) x (52^77) x (7^999) = units digit of 3*8*3 =2
• 11 years agoHelpfull: Yes(1) No(2)