Class VIII

Which of the following is used as a form of 5.05 * 106?
  1. 505000
  2. 505000000
  3. 5050000
  4. 50500000
[(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 is the standard form of 0.00001275?
  1. 1.275 * 10-5
  2. 1.275 * 105
  3. 127.5 * 10-7
  4. 127.5 * 107
1 micron = 1/1000000 m. which of the following is its standard form?
  1. 1.1 * 10-5
  2. 1.6 * 10-5
  3. 0.1 * 10-6
  4. 1.0 * 10-6
Which of the following = (100 - 990) * 100?
  1. 10000
  2. 10
  3. 9900
  4. 99000
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