Multiple choice general knowledge math & puzzles Select odd one out... now low cow how Reveal answer Fill a bubble to check yourself B Correct answer Explanation The words 'now', 'cow', and 'how' all rhyme with each other (ending in the /aʊ/ sound). 'Low' is the odd one out because it has a different vowel sound (ending in the /oʊ/ sound), despite the similar spelling.