Class VIII

[(1 / 2)-1 + (2 /3 )2 - (3/4)0]-2 is equal to:
  1. 81/484
  2. 81/169
  3. 169/81
  4. 16/81
Which of the following = (100 - 990) * 100?
  1. 10000
  2. 100
  3. 9900
  4. 99000
For which of the following is m= 8?
  1. (5m � 5-3) / 52 = 53
  2. -(5m � 5-3) / 53 = 52
  3. (5m � 53) / 52 = 53
  4. (5 � 5-2) / 52 = 53
What is the value of (-1)-1?
  1. 0
  2. -1
  3. 1
  4. None of these
Which of the following is the value of (4 / 5)-9 / (4 / 5)-9?
  1. (4/5)18
  2. . 4/5
  3. 1
  4. (5/4)9
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