Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 4, 12, 24, 32, 64, 72, ?

  1. 80
  2. 144
  3. 152
  4. 143

Answer

B. 144

Solution

Alternately add 8 and double: the next step is doubling, 72 × 2 = 144.

More Number Series questions

  1. What number(s) should complete the series: 1, 2, 3, 6, 11, 20, ?
  2. What number(s) should complete the series: 2/4, 3/8, 4/16, 5/32, ?
  3. What number(s) should complete the series: 2, 40, 4, 37, 8, 34, , ?
  4. What number(s) should complete the series: 12, 17, 24, 35, 48, 65, ?
  5. What number(s) should complete the series: 3, 12, 28, 53, 89, 138, ?
  6. What number(s) should complete the series: 47, 53, 59, 61, 67, ?
  7. What letter should complete the series: C, E, H, L, Q, ?
  8. What number(s) should complete the series: 4, 4, 8, 24, 96, ?
  9. What number(s) should complete the series: 215, 342, 511, 728, 999, ?
  10. What number(s) should complete the series: 7, 21, 16, 48, 43, 129, ?

All Number Series questions