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Practice mode Logical Reasoning

The drone flies if and only if the battery is charged. It is known that the battery is not charged. Which of the following must be true?

Correct answer A. The drone does not fly.

Explanation

'If and only if' works in both directions, so the two facts are always true together or false together. Since the battery is not charged, it follows that the drone does not fly.

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Question 02 Logical Reasoning

Five teachers, Rafiq, Farhana, Fatima, Zara and Ritu, each give one talk on a different day from Monday to Friday of the same week. Ritu gives the talk on some day before Fatima. Zara gives the talk on Tuesday. Exactly one day lies between the talks of Fatima and Ritu. Rafiq does not give the talk on Monday or Thursday. Who gives the talk on Wednesday?

Correct answer D. Fatima

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