Find the greatest number of five digits, which is exactly divisible by 7, 10, 15, 21 and 28.

• ANSWER : 99960
  
  SOLUTION :
  
  LCM of 7,10,15,21,28 is 420
  
  5 digit GREATEST multiple of 420 is 99960.
• 12 years agoHelpfull: Yes(14) No(7)
• The number should be exactly divisible by 15 (3, 5), 21 (3, 7), 28 (4, 7).
  Hence, it is enough to check the divisibility for 3, 4, 5 and 7.
  
  99960 is the only number which satisfies the given condition.
  this answer can be given on the basis of choises easily........
• 12 years agoHelpfull: Yes(3) No(3)
• answer: LCM of 7,10,15,21,28 = 420
  99999/420 quotient = 238
  238*420 = 99960
  therefore , greatest number divisible by 7,10,15,21,28 = 99960
• 8 years agoHelpfull: Yes(0) No(0)