If the pattern is A, C, E, G, what is the next letter in the sequence?

B. H

In the sequence 1, 3, 6, 10, what is the next number?

C. 21

In a certain code, 'MANGO' is written as 'NBOHP'. How would 'LEMON' be coded?

A. MFNPO

What is the letter that is 5 positions after 'T' in the alphabet?

B. U

If the letters are arranged in reverse order, what is the 15th letter?

C. N