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Math Flashcards

7 cards from real SATs 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 flashcards as text

  1. The mean of 5 numbers is 18. Four of them are 12, 15, 20, and 25. What is the fifth number?

    Answer: 18

    Total sum = 5 × 18 = 90; subtracting the four known values gives 90 − 72 = 18.

  2. A class of 30 students is 40% girls. How many boys are in the class?

    Answer: 18

    40% of 30 = 12 girls, so there are 30 − 12 = 18 boys.

  3. A bag contains 4 red, 6 blue, and 2 green marbles. What is the probability of drawing a blue marble?

    Answer: 1/2

    There are 6 blue marbles out of 12 total, so P = 6/12 = 1/2.

  4. A price increased from $80 to $100. What is the percent increase?

    Answer: 25%

    Percent increase = (20/80) × 100% = 25%.

  5. A map uses the scale 1 inch = 50 miles. Two cities are 3.5 inches apart on the map. What is the actual distance?

    Answer: 175 miles

    3.5 inches × 50 miles/inch = 175 miles.

  6. The scores 72, 85, 90, 90, and 95 are listed in order. What is the median?

    Answer: 90

    With 5 sorted values, the median is the 3rd value: 90.

  7. If 60% of x equals 36, what is 80% of x?

    Answer: 48

    x = 36/0.6 = 60, and 80% of 60 = 48.

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  1. gov.uk — Exam format, time limit, passing score, score release, exam dates, test dates · verified Oct 2026