Skip to content / Đến nội dung
ThichHocToan.com

BEBRAS 2019 Grade 3-4 Round 2 Ext Question 4

BEBRAS · BEBRAS 2019 Grade 3-4 Round 2 Ext

Question 4

Beaver-language words follow these printed rules:
- Use only the three symbols shown.
- Start with one symbol or two identical symbols.
- Add to the left and right of a word to form a new word.

Question illustration

Some example words are shown below.

Question illustration

Which of the following words does not occur in the language?

Question illustration

Editorial note: the last printed rule does not say which symbols or how many symbols must be added at each end. The conditional analysis below uses the same symbol at both ends, as suggested by the examples; the original wording alone is incomplete.
  1. Word A in the original figure
  2. Word B in the original figure
  3. Word C in the original figure
  4. Word D in the original figure