(1/10) 18 - (1/10) 20 = ?
(a) 99/10 20 (b) 99/10 (c) 0.9 (d) none of these

• d) none of these
  
  1.8 - 2.0 = -0.2
• 13 years agoHelpfull: Yes(9) No(2)
• it is not given clearly... it must be understood that
  (1/10)power 18 - (1/10)power 20
  now by solving, we get 99/(10 power 20) which is option 1
• 11 years agoHelpfull: Yes(7) No(1)
• (18/10)-2;
  1.8-2=
  -0.2
• 12 years agoHelpfull: Yes(3) No(1)
• by taking (1/10) as a common term
  (1/10)*(18-20)=-0.2.
  ans.D
• 12 years agoHelpfull: Yes(2) No(1)
• (d)none of these
• 12 years agoHelpfull: Yes(2) No(1)
• (1/10 to power 18 - 1/10 to power 20 ) is actual question... taking 10 to power 20 as lcm solve it finally u get (100-1)/10^20 that is = 99/1020.. so option A is correct
• 11 years agoHelpfull: Yes(2) No(0)
• d)none of these
  
• 12 years agoHelpfull: Yes(1) No(1)
• 9/5-2=1.8-2=-0.2
  so ans is d
• 12 years agoHelpfull: Yes(1) No(1)
• none of these
  ans: -0.2
• 11 years agoHelpfull: Yes(0) No(0)
• Ans:(d)
  (18/10)-(20/10)=-0.2
• 11 years agoHelpfull: Yes(0) No(0)