Unit 12 · Multi-Step Conditional Reasoning
Secret Agent Code — Shift by 2
Lesson 9 of 16
About this lesson
A secret agent sends you a coded message: YFCPBKFVFGWCTPKXG. The cipher is simple — each letter is shifted by 2 forwards or backwards — but you need to check every letter of a 17-letter message against four possible answers. This question rewards students who stay methodical and eliminate options the moment they find a letter that cannot be decoded.
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Question
A secret agent uses a code to send messages. It involves shifting each letter of the alphabet forwards or backwards two letters, so for example the letter 'C' could be represented by either 'A' or 'E'. There are no spaces between words in this code.
You receive the following message from the secret agent:
YFCPBKFVFGWCTPKXG?
Which of the following could be the intended message?
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