EASA Part-66 Module 1: Mathematics
Arithmetic, algebra and geometry underpinning all maintenance theory.
Everything on this page is open and needs no account. Play the simulations, answer the sample questions, then open the full module for notes, mind maps and the complete question bank.
Interactive simulations
Manipulate the theory yourself, drag the controls and watch it respond.
Sample exam questions
Real Part-66-style multiple choice with explanations. Options are shuffled each attempt, just like the exam.
Arithmetic Check
1. What is −4 × −3?
12−12−72. What is −8 + 3?
−55−113. What is −6 − (−2)?
−4−844. What is 5 × (−2)?
−1010−75. What is −20 ÷ 4?
−55−166. The product of two numbers with unlike signs is:
NegativePositiveZero7. What is 12 × 8?
96104868. What is 144 ÷ 12?
1214119. What is 7 × 6?
42483610. A gearbox steps 3000 rpm down in the ratio 5 : 2. What is the output speed?
1200 rpm7500 rpm600 rpm11. What is 25 × 4?
1009012512. What is 156 ÷ 13?
12131113. Express 0.375 as a fraction in lowest terms.
3/81/45/814. What is 1/2 + 1/4?
3/42/61/315. Express 3/4 as a decimal.
0.750.340.43
Algebra (Cat A)
1. Simplify 3a + 2b − a + 4b.
2a + 6b4a + 6b2a + 2b2. Simplify 5x + 3x.
8x15x2x3. Simplify 7y − 2y.
5y9y14y4. Simplify 4a + 3b + 2a.
6a + 3b9ab6a + 35. Simplify 8m − 3m − 2m.
3m13m5m6. Simplify 2x + 5y − x + y.
x + 6y3x + 6yx + 4y7. Simplify 6p − 4p + 3q.
2p + 3q10p + 3q2p − 3q8. Simplify a + a + a.
3aa³39. Simplify 9c − c.
8c9c10c10. Simplify 4x + 2y + 3x − y.
7x + y7x + 3yx + y11. Simplify 5a + 2b − 3a − b.
2a + b8a + 3b2a − b12. Simplify 10 − 3x + 5x.
10 + 2x10 − 2x12x13. Simplify 3ab + 2ab.
5ab6ab5a²b²14. Simplify 7x + 0.
7x0715. Simplify 2a − 5a.
−3a3a7a
Unlock the full Module 1
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