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

• Any 8 digit number divisible by 4 will be those which end with : 12,24,44,52,32.
  First 6 digits can be filled using any 5 digits and last 2 digits can b filled by using above 5 combinations..
  therefore required combinations will be : 5*5*5*5*5*5*(3+2)= 5^7.
  
• 11 years agoHelpfull: Yes(14) No(1)
• Any number whose last two digits are divisible by 4 will be divisible by 4.
• 11 years agoHelpfull: Yes(1) No(0)
• Any 8 digit number that is divisible by 4 if the last 2 digits is a number i.e divisible by 4.
  
  Examples:
  
  11111124 , 24 is divisible by 4 so this 8 digit number is divisible by 4.
  
  Other examples:
  
  12312312, 12 is divisible by 4
  
  55514244, 44 is divisible by 4
  
  43251152, 52 is divisible by 4
• 11 years agoHelpfull: Yes(1) No(0)
• 54321456
  as 54321456 can be divided by 4
• 11 years agoHelpfull: Yes(0) No(11)
• 32521424
  as 32521424 can be divided by 4
  The answer is 32521424/4=813356.
  So answer is 32521424 is divided by 4.
• 11 years agoHelpfull: Yes(0) No(0)
• for last two digits there are only 5 pairs 12,24,32,44,52
  ther for ans=5*5*5*(5)=125*5=625
• 11 years agoHelpfull: Yes(0) No(2)