Identify the missing number in the series: 3, 6, 11, 18, ?

A. 25

Teacher is to School as Doctor is to ?

A. HOSPITAL

If '?' means addition, '?' means subtraction, and '?' means multiplication, what is the result of 5 ? 3 ? 2 ? 4?

B. 10

Which group of letters is the odd one out?

B. ACE

Bird is to Fly as Fish is to ?

A. SWIM