THREE LETTER-RIDDLES

1. Consider the five vowels, A, E, I, O, and U. What is true of I, O, and U, but not of A or E?

2. Consider the letters F, G, H, and I. What is true of F and G, but not H or I?

3. What is unique about the letters A, B, and O?

Answers:

1. I, O, and U are symbols of elements, but not A or E.

2. F and G are musical notes, but not H or I.

3. They are used to designate human blood types.