If n = 10 x 18 x 22, which of the following is NOT an integer?
(a) n / 132 (b) n / 55 (c) n / 45 (d) n / 20 (e) n / 78

• by taking the prime factors,
  we can write n as (5*2)*(2*3*3)*(11*2)=2*2*2*3*3*5*11
  now 132=11*12=2*2*3*11 so it is perfectly divides n
  similarly 55=5*11
  45=3*3*5
  20=2*2*5
  which are also perfectly divides n...
  but 78=2*3*13 which cant divide n perfectly...
  
  so n/78 is not an integer...
  
• 12 years agoHelpfull: Yes(20) No(0)
• YEAH MY MISTAKE SAINATH IS RIGHT
• 12 years agoHelpfull: Yes(1) No(0)
• ANS=A
  SIMPLE CHECK THE OPTION
• 12 years agoHelpfull: Yes(0) No(6)