Look at this series: 63, 63, 50, 50, 37, 37, … What number should come next?

  1. 21,21
  2. 24,24
  3. 27,27
  4. 25,25

Look at this series: 36, 34, 30, 28, 24, … What number should come next?

  1. 24
  2. 20
  3. 26
  4. 22

Look at this series: 4,7, 5, 8, 6, 9, … What number should come next?

  1. 11
  2. 5
  3. 7
  4. 9

Look at this series: 2, 1, (1/2), (1/4), … What number should come next?

  1. 1/8
  2. 1/6
  3. 1/4
  4. 2/8