Multiple choice general knowledge math & puzzles

In Roman numerals, the next term in the sequence LXIV,XXXVI,XVI,… is

  1. II

  2. IV

  3. IX

  4. X

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pattern halves each time: LXIV=64, XXXVI=36, XVI=16. The sequence is 64, 36, 16, 4, which are 8², 6², 4², 2². The next term is 4, which is IV in Roman numerals. Alternatively, remove the first numeral from each: LXIV→XIV→IV, or notice the pattern of removing leading characters.