Letter patterns

Dr Zonga has two letter-based patterns for you to solve this week.

Question One:

These letters follow a familiar sequence. Which letter comes next?

O T T F F S S 

Question Two:

If ABC goes to ABD then what does XYZ go to?

Think you've got the answer?

Check it here    

The solution was given LIVE on Instagram, 5pm (CET), 23rd April 2021

Click here to watch