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NBT Logical Reasoning & Problem Solving 2 Flashcards

6 cards from real NBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. All students in the maths class passed the exam. Thabo is a student in the maths class. What must be true?

    Answer: Thabo passed the exam

    This is a valid deductive argument (syllogism). If all students passed and Thabo is a student in the class, then Thabo must have passed.

  2. A pattern of numbers: 3, 6, 12, 24, ___. What is the next number?

    Answer: 48

    Each term is multiplied by 2. 24 × 2 = 48.

  3. Siya is taller than Bongani. Bongani is taller than Lungile. Which of the following must be true?

    Answer: Siya is taller than Lungile

    If Siya > Bongani and Bongani > Lungile, then by transitivity: Siya > Lungile.

  4. If "all mammals breathe air" and "dolphins are mammals," what is the logical conclusion?

    Answer: Dolphins breathe air

    Valid deductive reasoning: dolphins are mammals (given), all mammals breathe air (given), therefore dolphins breathe air.

  5. A student must choose 2 subjects from: Mathematics, History, Science, and Art. How many different combinations are possible?

    Answer: 6

    Combinations: C(4,2) = 4! / (2! × 2!) = (4 × 3) / (2 × 1) = 6 combinations.

  6. A box contains 4 red, 3 blue, and 3 green balls. One ball is drawn at random. What is the probability of drawing a red ball?

    Answer: 2/5

    Total balls: 4 + 3 + 3 = 10. P(red) = 4/10 = 2/5.