Logical Thinking

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?




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All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

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The pound is not a finish.

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- Get rid of two letters from one word.
- Swap a word with its antonym.

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Complete the table series riddle by finding the number that can replace "??".

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Crossword puzzles

In the 1920s, people feared that crossword puzzles would contribute to illiteracy.