Six years ago, mother's age was 20 years more than the son's age. If the sum of their present ages is 34, what was the age of the mothers 6 years ago?
1) 21 years
2) 28 years
3) 34 years
4) 36 years

• 6years ago
  
  Mother | son age
  x+20 yrs| X yrs
  
  Present ages
  
  Mother +6 | son age +6
  x+20+6 yrs| X +6 yrs
  sum of their present ages is 34
  (x+20+6)+(x+6) = 34
  2x = 2 ==> x = 1
  the age of the mothers 6 years ago is x+20 ==> 21 years
• 8 years agoHelpfull: Yes(8) No(0)
• 1) 21 years
  
  If present age of Mother=m and Son=s, then
  6 years ago : m-6=(s-6)+20 or m-s=20 ----(i) and
  Sum of present age: m+s=34 ---(ii)
  From (i) & (ii), s=7, m=27
  So mother's age 6 years ago=27-6=21 years
• 8 years agoHelpfull: Yes(2) No(1)
• let s=son's age and m=mother's age
  6yrs ago,m=s+20
  at present,(s+6)+(s+20+6)=34=>s=1
  m=20+1=21
• 4 years agoHelpfull: Yes(0) No(0)