⚡ Maths Daily Helper

Free AMC & AIME Practice Problems with Solutions

Competition-style problems for AMC 8, AMC 10, AMC 12 and AIME, across algebra, number theory, combinatorics and geometry, with full worked solutions. Free to practise daily.

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The AMC and AIME reward pattern recognition and clever problem-solving far more than raw syllabus knowledge. The way to build that is exposure: work through a large number of varied competition problems, then study clean solutions to absorb the recurring ideas and techniques. Maths Daily Helper generates fresh AMC and AIME-style problems across the core competition areas, each with a full worked solution, so you always have a new challenge and a model answer to learn from.

Areas covered

Try a few AMC / AIME-style problems

Attempt each one on paper first, then reveal the working.

Number Theory · AMC 10

What is the remainder when 3¹⁰⁰ is divided by 5?

Step-by-step solution

1. The powers of 3 mod 5 cycle: 3¹ ≡ 3, 3² ≡ 4, 3³ ≡ 2, 3⁴ ≡ 1, then repeat every 4.

2. 100 mod 4 = 0, matching the end of the cycle, where 3⁴ ≡ 1.

Answer: 1.

Combinatorics · AMC 10

How many ways can the letters of the word "MATH" be arranged?

Step-by-step solution

1. There are 4 distinct letters, so the number of arrangements is 4!.

2. 4! = 4 × 3 × 2 × 1 = 24.

Answer: 24.

Algebra · AMC 12

If x + 1/x = 3, find x² + 1/x².

Step-by-step solution

1. Square both sides: (x + 1/x)² = x² + 2 + 1/x² = 9.

2. So x² + 1/x² = 9 − 2.

Answer: 7.

Number Theory · AIME

Find the sum of the digits of the number 10⁴ − 1.

Step-by-step solution

1. 10⁴ = 10000, so 10⁴ − 1 = 9999.

2. Sum of digits = 9 + 9 + 9 + 9 = 36.

Answer: 36.

Combinatorics · Probability · AMC 12

Two fair coins are tossed. What is the probability of getting exactly one head?

Step-by-step solution

1. The equally likely outcomes are HH, HT, TH, TT, four in total.

2. Exactly one head occurs in HT and TH, that is 2 outcomes.

3. Probability = 2/4 = 1/2.

Answer: 1/2.

Geometry · AMC 10

A square has area 49. What is the length of its diagonal?

Step-by-step solution

1. Side length = √49 = 7.

2. The diagonal of a square is side × √2 = 7√2.

Answer: 7√2.

Algebra · Sequences · AMC 10

Find the sum 1 + 2 + 3 + … + 100.

Step-by-step solution

1. Use the formula for the sum of the first n integers: n(n + 1)/2.

2. = 100 × 101 / 2 = 10100 / 2.

Answer: 5050.

Number Theory · AIME

How many positive divisors does 36 have?

Step-by-step solution

1. Prime factorise: 36 = 2² × 3².

2. The number of divisors is (2 + 1)(2 + 1) = 3 × 3.

Answer: 9.

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How to train for AMC and AIME

Competition maths is a skill built through volume and reflection. Solve a handful of problems daily, and when one defeats you, study the solution until the key idea is clear, then look for that idea again in later problems. Timed practice matters too: the AMC gives you 75 minutes for 25 questions, so pace is part of the challenge. Rotate across algebra, number theory, combinatorics and geometry so no area lags behind.