Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 12, 18, 99, 22, 28, 99, 32, , 99?

  1. 42
  2. 38
  3. 36
  4. 40

Answer

B. 38

Solution

Three interleaved tracks repeating every 3 terms: one adds 10 (12, 22, 32), another adds 10 (18, 28, 38), and the third stays constant at 99.

More Number Series questions

  1. What number(s) should complete the series: 50, 5, 46, 9, 42, 13, 38, , ?
  2. What number(s) should complete the series: 2, 640, 6, 320, 18, 160, 54, , ?
  3. What number(s) should complete the series: 100, 97, 94, 90, 87, 84, 80, ?
  4. What number(s) should complete the series: 0.5, 1.1, 1.7, 2.3, ?
  5. What number(s) should complete the series: 2 1/2, 3 3/4, 5, 6 1/4, ?
  6. What number(s) should complete the series: 1/3, 2/5, 3/7, 4/9, ?
  7. What number(s) should complete the series: XV, 3, XIII, 6, XI, 9, , 12?
  8. What number(s) should complete the series: B4, D8, F12, H16, ?
  9. What number(s) should complete the series: 3, 100, 6, 50, 12, 25, 24, ?
  10. What number(s) should complete the series: 5, 50, 8, 46, 11, 42, , ?

All Number Series questions