AFQT Plan

AFQT practice question: Mathematics Knowledge (MK)

Mathematics Knowledge (MK)Difficulty 2/5

A right triangle has legs of 6 and 8. What is the length of the hypotenuse?

  1. A12
  2. B14
  3. C48
  4. D10
Show answer and rationale

Correct: D. Pythagorean theorem: 6² + 8² = 36 + 64 = 100; √100 = 10.

  • A — 12 is not √100.
  • B — 14 is the sum of the legs, not the hypotenuse.
  • C — 48 is the product of the legs.

Concept being tested

Algebra and geometry — solving equations and inequalities, exponents, factoring, angles, area/perimeter/volume, number properties. Counts once in the AFQT. P&P 25 questions / 24 minutes. — 25% of the exam. Study guide for Mathematics Knowledge (MK).

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Primary references

  1. What to Expect — CAT-ASVAB and paper-and-pencil subtests, counts and time limits — Official ASVAB (U.S. Department of Defense) · government · retrieved 2026-09-21, verified 2026-09-21
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