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HBS Mathematics Flashcards

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

Read the first 6 HBS Mathematics flashcards as text

  1. A train travels 240 miles in 3 hours. What is its average speed in miles per hour?

    Answer: 80 mph

    Average speed = distance ÷ time = 240 ÷ 3 = 80 mph.

  2. What is 15% of 240?

    Answer: 36

    15% of 240 = 0.15 × 240 = 36.

  3. A rectangle has a perimeter of 56 cm. If its length is 18 cm, what is its width?

    Answer: 10 cm

    Perimeter = 2(length + width), so 56 = 2(18 + w), giving w = 10 cm.

  4. What is the value of 7² + 5²?

    Answer: 74

    7² = 49 and 5² = 25, so 49 + 25 = 74.

  5. If a bag contains 4 red, 6 blue, and 2 green marbles, what fraction of the marbles are blue?

    Answer: 1/2

    Total marbles = 12; blue = 6; fraction = 6/12 = 1/2.

  6. What is the smallest prime number greater than 20?

    Answer: 23

    23 is prime (divisible only by 1 and itself); 21 = 3×7, 22 = 2×11, 25 = 5×5.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. barnet.gov.uk — Late registration, registration deadline · verified Oct 2026
  2. hbschool.org.uk — Exam format, late registration, score release, exam information · verified Oct 2026
  3. henrietta-barnett.ams3.digitaloceanspaces.com — Test delivery, passing score, retake policy, score release, eligibility · verified Oct 2026