Class VI

If a necklace is bought for $x and sold for $y then profit is
  1. $xy
  2. $y - $x
  3. $y + $x
  4. $x - $y
Considering formula 1⁄w = 1⁄x + 1⁄y + 1⁄z, then if x = 5, y = 10, and z = 15, value of 1⁄w is
  1. 11⁄20
  2. 11⁄30
  3. 30⁄11
  4. 20⁄11
Considering inequalities, nine is
  1. < 11
  2. < 5
  3. < 7
  4. > 14
Considering inequality, (2.5)2
  1. > (4)2
  2. > -4.53
  3. > (2)3
  4. > (5.8)3
A chocolate cupcake costs 90 cents. maximum number of cakes customer can buy with 12 dollars are
  1. x < 15
  2. x < 20
  3. x < 16
  4. x < 18
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