To solve this all you have to do is round to the nearest synonym, average it out then add a preposition. In your case, 11 is the syllable and the closest synonyms are 98 and 0.1789. Since 11 is undoubtable closer to 98, you have to average it out between the two numbers. In the end you get the number 54.5, which you then proceed to add the preposition, half of eleven(5.5). The final answer is 60.
The way to answer ANY maths question is to listen to your Math Teacher in the first place .. and ask him questions if you do not understand something.