EASA Part 66 · Module 1

Free Part 66 Module 1 sample questions

A free set of EASA Part 66 Module 1 (Mathematics) practice questions with fully worked answers — no account needed. They show the style and difficulty of the full question bank, which holds over 1,000 questions across every Module 1 topic.

1.1 Arithmetic

Fractions

What is ³⁄₄ of 60?

  • 40
  • 45
  • 48

Answer: 60 ÷ 4 = 15, then 15 × 3 = 45.

Percentages

What is 15% of 240?

  • 24
  • 36
  • 48

Answer: 15% = 0.15, and 0.15 × 240 = 36.

Ratio and proportion

£50 is split in the ratio 2:3. What is the larger share?

  • £20
  • £25
  • £30

Answer: There are 2 + 3 = 5 parts. 50 ÷ 5 = 10 per part, so the larger share is 3 × 10 = £30.

Averages

What is the mean of 4, 8, 10 and 14?

  • 8
  • 9
  • 10

Answer: Sum = 36, and 36 ÷ 4 = 9.

Powers and indices

What is 2⁵?

  • 10
  • 25
  • 32

Answer: 2 × 2 × 2 × 2 × 2 = 32.

Square roots

What is the square root of 144?

  • 12
  • 14
  • 72

Answer: 12 × 12 = 144, so √144 = 12.

1.2 Algebra

Linear equations

Solve for x: 3x + 7 = 22.

  • 3
  • 5
  • 7

Answer: Subtract 7 from both sides: 3x = 15. Divide by 3: x = 5.

Transposition

Rearrange v = u + at to make a the subject.

  • a = (v − u)/t
  • a = (v + u)/t
  • a = v − u − t

Answer: Subtract u from both sides: v − u = at. Divide by t: a = (v − u)/t.

Numbering systems

What is the binary number 1011 in decimal?

  • 9
  • 11
  • 13

Answer: 1011 = (1×8) + (0×4) + (1×2) + (1×1) = 11.

Indices

Simplify 2³ × 2².

  • 2⁵
  • 2⁶
  • 4⁵

Answer: When multiplying powers of the same base, add the indices: 3 + 2 = 5, giving 2⁵.

Second-degree equations

Solve x² = 49 (take the positive root).

  • 7
  • 24.5
  • 2401

Answer: x = √49 = 7.

Logarithms

What is log₁₀(1000)?

  • 2
  • 3
  • 100

Answer: 10³ = 1000, so log₁₀(1000) = 3.

1.3 Geometry & trigonometry

Pythagoras

A right-angled triangle has legs 3 cm and 4 cm. What is the length of the hypotenuse?

  • 5 cm
  • 7 cm
  • 12 cm

Answer: Hypotenuse = √(3² + 4²) = √(9 + 16) = √25 = 5 cm.

Areas

What is the area of a triangle with base 10 cm and height 6 cm?

  • 16 cm²
  • 30 cm²
  • 60 cm²

Answer: Area = ½ × base × height = ½ × 10 × 6 = 30 cm².

Trigonometry ratios

What is sin 30°?

  • 0.5
  • 0.866
  • 1

Answer: sin 30° = 0.5 — one of the standard exact values worth memorising.

Angles

Two angles of a triangle are 40° and 60°. What is the third angle?

  • 80°
  • 90°
  • 100°

Answer: Angles in a triangle sum to 180°: 180 − 40 − 60 = 80°.

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