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Math: Computation and Problem-Solving Flashcards

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

Read the first 7 Math: Computation and Problem-Solving flashcards as text

  1. A plumber charges a $45 flat fee plus $30 per hour. If the total bill is $165, how many hours did the plumber work?

    Answer: 4

    $165 − $45 = $120 remaining, and $120 ÷ $30 = 4 hours.

  2. What is the area of a triangle with a base of 14 cm and a height of 9 cm?

    Answer: 63 cm²

    Area = ½ × base × height = ½ × 14 × 9 = 63 cm².

  3. If a shirt originally costs $60 and is now priced at $45, what is the percent decrease?

    Answer: 25%

    Decrease = $15; percent decrease = 15/60 × 100 = 25%.

  4. Which of the following fractions is between 1/3 and 1/2?

    Answer: 2/5

    1/3 ≈ 0.333 and 1/2 = 0.5; 2/5 = 0.4, which lies between them.

  5. A store buys an item for $40 and marks it up 35%. What is the selling price?

    Answer: $54.00

    35% of $40 = $14, so selling price = $40 + $14 = $54.

  6. On a number line, which value is between −3/4 and −1/4?

    Answer: −1/2

    −1/2 = −0.5, which lies between −0.75 and −0.25.

  7. A class of 30 students took a test. The scores were: 10 students scored 70, 12 students scored 80, and 8 students scored 90. What is the class average?

    Answer: 79

    Total = (10×70)+(12×80)+(8×90) = 700+960+720 = 2380; average = 2380/30 ≈ 79.3, closest to 79.