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Sticky Note
If x : y = 7 : 3, then the value of xy+y2x2−y2 is
  1. 3/4
  2. 5/6
  3. 3/7
  4. 6/8
Explanation

=xy=73=xy+y2x2−y2=(xy)+1(x2y2)−1=73+1(73)2−1=103×940=3/4

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What is the remainder when 9⁶+7 is divided by 8?
  1. 0
  2. 1
  3. 6
  4. 7
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