form 8 digit numbers from by using 1,2,3,4,5 with repetition is allowed and must be divisible by 4?

• 8- digit nos divisible by 4 are
  
  _ _ _ _ _ _ 1 2
  
  _ _ _ _ _ _ 2 4
  
  _ _ _ _ _ _ 3 2
  
  _ _ _ _ _ _ 4 4
  
  _ _ _ _ _ _ 5 2
  
  for first 6 placse we can arrange the digits with repetition in=5*5*5*5*5*5 ways
  and for last 2 places we have 5 ways
  so total we have= 5^7 ways
• 13 years agoHelpfull: Yes(28) No(1)
• 5^7. for divisible by 4 the last digit should be 12,24,32,44,52. and the rest no.s can be arranged in 6places in 5^6 ways. so the ultimate ans is 5^7
• 13 years agoHelpfull: Yes(8) No(1)
• 5^7
• 13 years agoHelpfull: Yes(5) No(8)
• 5pow7
• 13 years agoHelpfull: Yes(5) No(5)
• 5^7 is the answer
• 13 years agoHelpfull: Yes(4) No(4)