If x and y are the two digits of the number 653xy such that this number is divisible by 80, then
what is x + y = ?

• ans is 6
  817*80=65360
  x=6,y=0
  x+y=6
• 10 years agoHelpfull: Yes(1) No(0)
• 80=8*10=16*5
  since 5 is present then last digit must be either 5,0 then the number is divisible by 5
  since number must be divisible by 2 it must be a even number so y=0 is the only case possible
  in order to divisible by 8 its last 3 digits must be divisible by 8 so 653x0/80 = 653x/8 so last three digits 53x must be divisible by 8 so 8*67=536 (53x=536)
  so x=6 and y=0
  x+y=6
• 10 years agoHelpfull: Yes(0) No(0)