Class XI

The fraction (5x-11)/(2x2 + x - 6) was obtained by adding the two fractions A/(x + 2) and B/(2x - 3). The values of A and B must be, respectively:
  1. 5x, -11
  2. -11, 5x
  3. -1, 3
  4. 3, -1
If 102y = 25, then 10-y equals:
  1. -1/5
  2. 1/625
  3. 1/50
  4. 1/5
. A man has $ 10,000 to invest. He invests $ 4000 at 5 % and $ 3500 at 4 %. In order to have a yearly income of $ 500, he must invest the remainder at:
  1. 6 %
  2. 6.1%
  3. 6.2 %
  4. 6.4 %
Mr. Jones sold two pipes at $1.20 each. Based on the cost, his profit one was 20% and his loss on the other was 20%. On the sale of the pipes, he:
  1. broke even
  2. lost 4 cents
  3. lost 10 cents
  4. gained 10 cents
The distance light travels in one year is approximately 5,870,000,000,000 miles. The distance light travels in 100 years is:
  1. 587 × 108 miles
  2. 587 × 1010 miles
  3. 587 × 10-10 miles
  4. 587 × 1012
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