what are the ages of the three brothers?
1) the product of their ages is 21
2) the sum of their ages is not divisible by 3.

• Let x,y,z their ages
  Xyz=21
  7*3*1=21
  
• 9 years agoHelpfull: Yes(0) No(0)
• how to find 7,3,1?
• 9 years agoHelpfull: Yes(0) No(0)
• There ages are 7,3,1, it satisfies both condition
  1) product 7*3*1=21
  2) sum 7+3+1 =11 not divisible by 3
• 8 years agoHelpfull: Yes(0) No(0)
• 7*3*1=21;
  7+3+1=11,not divisible by 3
• 8 years agoHelpfull: Yes(0) No(0)
• xy=21
  let us tk:
  x+y=4(not divisible by 3)
  putting value
  x(4-x)=21
  x=7 and y=3
  
• 8 years agoHelpfull: Yes(0) No(0)
• 1, 3 and 7
  As their product is 21
  and their sum is not divisible by 3
• 8 years agoHelpfull: Yes(0) No(0)
• it can't be answer as there may be case that two brothers are twins and their age is 1 and third child have age of 21.
  so (1*1*21=21)
  (1+1+21=23) not divisible by 3
• 7 years agoHelpfull: Yes(0) No(0)
• answer is 1,3,7
• 6 years agoHelpfull: Yes(0) No(0)