Multiple choice

Find the term which does not fit into the series:1CV, 5FU, 9IT, 15LS, 17OR

  1. 5FU

  2. 15LS

  3. 9IT

  4. 17OR
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In 1CV, 5FU, 9IT, 15LS, 17OR, the first letters follow the sequence 1, 5, 9, 15, 17 (odd numbers but 17 should be 19). The last letters are V, U, T, S, R (backward consecutive). The middle letters follow C→F→I→L→O (+3 each). 15LS breaks the number pattern.

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