alleryStart learning →Which sentence can a knave, who always lies, never say?
AIce is hot in winter
BA week has 7 days
CThe Sun rises in the west
DA week has 8 days
Answer & Solution
Correct answer: B. A week has 7 days
A week really has 7 days, so the sentence is true, and a knave can only speak false sentences.
Keep practising Logic Puzzle
Browse all Logic Puzzle questions for Olympiad (Class 5), or explore more Reasoning topics.
Related questions
In a magic square, which lines must all add up to the same sum?Magic squares date back to at least 190 BCE in which country?One row of a magic square adds up to 15. What does each column add up to?Can 1, 2, 3 and 4 fill a 2x2 grid so all rows, columns and diagonals have equal sums?Which number sits in the centre of a normal 3x3 magic square made from 1 to 9?In a 3x3 magic square with constant 15, a row reads 8, blank, 6. Which number fills the blA normal 3x3 magic square uses the numbers 1 to 9 once each. What is its magic constant?A mini sudoku grid with 4 rows and 4 columns is divided into boxes of which size?