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Mathematical Reasoning Arithmetic and Number Sense Flashcards

6 cards from real GED 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. Which of the following is a prime number?

    Answer: 59

    59 has no factors other than 1 and itself. 51 = 3×17, 57 = 3×19, 63 = 7×9.

  2. Evaluate: −4² + 3 × (−2)

    Answer: −22

    Following order of operations: −4² = −16 (exponent applies to 4 only), 3 × (−2) = −6, then −16 + (−6) = −22.

  3. A jar contains 12 red marbles, 8 blue marbles, and 5 green marbles. What is the probability of randomly selecting a blue marble?

    Answer: 8/25

    Total marbles = 12 + 8 + 5 = 25. P(blue) = 8/25.

  4. What is the least common multiple (LCM) of 12 and 18?

    Answer: 36

    The LCM of 12 and 18 is 36. Multiples of 12: 12, 24, 36… Multiples of 18: 18, 36… The smallest shared multiple is 36.

  5. A worker earns $18.50 per hour and works 37.5 hours in a week. What are the worker's gross earnings for that week?

    Answer: $693.75

    $18.50 × 37.5 = $693.75. Multiply hourly rate by hours worked.

  6. Simplify: 48 ÷ (−6) + (−3)²

    Answer: 1

    48 ÷ (−6) = −8; (−3)² = 9; −8 + 9 = 1.