Maths Corner Week 3

Week 3

This is maths corner week 3. In the previous week only two people participated and Lanre and Omobola were the mathematical geniuses who got the answer correctly. That means for the next week Lanre and Omobola are the Mathematics Kings( or queens) of this week. The correct answer was 247. Once again well done Lanre and Omobola. The question for this week is:

If 2, 6, 13, 14, 15 and __ make a mean of 11 what is the last number.

Please answer with names in comments below.