Class IX

Express of 1.6 as rational number in the form of p/q is
  1. 5/3
  2. 4/3
  3. 2/3
  4. 1/3
Expression of 2.33 as a rational in form of p/q
  1. 231/98
  2. 230/99
  3. 231/99
  4. 233/99
If a,b and c are real number such as a
  1. (a/c) < (b/c)
  2. (ac)< (bc)
  3. (c/a) > (c/b)
  4. (ac) > (bc)
which one of the following is prime number
  1. 161
  2. 171
  3. 173
  4. 221
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