In the sequence 3, 6, 9, 12, 15, 18, how many times does the number 12 occur?

A. 1

If the word 'HELLO' is coded as '85121215', what is the code for 'WORLD'?

A. 2318124

In the sequence A, B, C, D, E, F, which letter is in the 3rd position?

B. C

If 'APPLE' is coded as 116312, what is the code for 'LEMON'?

A. 12141314

What is the next letter in the series: A, C, E, G, ?

A. I