14. When numbers are written in base b, we have 12 x 25 = 333. The value of b is
a. None of the choices
b. 7
c. 8
d. 6

• for this problem we have to go fro options......
  first take option b.7
  LHS......12=7^0*2+7^1*1=2+7=9
  LHS.......25=7^0*5=5+7^1*2=5+14=19
  LHS....we obtain 9*19=171
  for RHS....333=7^0*3+7^1*3+7^2*3=171
  so LHS=RHS
  note(all these calc mus b done from right 2 left)
  ANS is ....7
• 12 years agoHelpfull: Yes(27) No(2)
• ANS : b.7
  Now base 7 representation of 12 is = 7*1+2 = 9
  and similarly base 7 representation of 25 is 2*7+5 =19
  now 9*19 = 171
  lastly base 7 representation of 333 is = (7^2)*3+ 7*3 + 3 = 171
  So ans is 7
• 12 years agoHelpfull: Yes(9) No(3)
• throw options LHS=RHS we hv to verify
  7^0*2+7^1*1=9,7^0*5+7^1*2=19
  7^0*3+7^1*3+7^2*3=171 i.e RHS
  19*9=171 i.e LHS
• 12 years agoHelpfull: Yes(3) No(4)
• (b+2)(2b+5)=3b^2+3b+3
  by solving we get
  b=7
  
• 9 years agoHelpfull: Yes(2) No(0)
• hey hara priya pls mail me some questions shyamleshd@gmail.com
• 12 years agoHelpfull: Yes(1) No(4)
• hey hari priya please send de tcs papers to dimpu.k@gmail.com
• 12 years agoHelpfull: Yes(0) No(2)