2021 CMC 12A Problems

2021 CMC 12A (Answer Key) Printable version: | AoPS Resources

Instructions This is a 25-question, multiple choice test. Each question is followed by answers marked A, B, C, D and E. Only one of these is correct. You will receive 6 points for each correct answer, 2.5 points for each problem left unanswered if the year is before 2006, 1.5 points for each problem left unanswered if the year is after 2006, and 0 points for each incorrect answer. No aids are permitted other than scratch paper, graph paper, ruler, compass, protractor and erasers (and calculators that are accepted for use on the test if before 2006. No problems on the test will require the use of a calculator). Figures are not necessarily drawn to scale. You will have 75 minutes working time to complete the test.

1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25

Problem 1

Hold your horses! The test hasn't finished yet.

Solution

Problem 2

Hold your horses! The test hasn't finished yet.

Solution

Problem 3

Hold your horses! The test hasn't finished yet.

Solution

Problem 4

Hold your horses! The test hasn't finished yet.

Solution

Problem 5

Hold your horses! The test hasn't finished yet.

Solution

Problem 6

Hold your horses! The test hasn't finished yet.

Solution

Problem 7

Hold your horses! The test hasn't finished yet.

Solution

Problem 8

Hold your horses! The test hasn't finished yet.

Solution

Problem 9

Hold your horses! The test hasn't finished yet.

Solution

Problem 10

Hold your horses! The test hasn't finished yet.

Solution

Problem 11

Hold your horses! The test hasn't finished yet.

Solution

Problem 12

Hold your horses! The test hasn't finished yet.

Solution

Problem 13

Hold your horses! The test hasn't finished yet.

Solution

Problem 14

Hold your horses! The test hasn't finished yet.

Solution

Problem 15

Hold your horses! The test hasn't finished yet.

Solution

Problem 16

Hold your horses! The test hasn't finished yet.

Solution

Problem 17

Hold your horses! The test hasn't finished yet.

Solution

Problem 18

Hold your horses! The test hasn't finished yet.

Solution

Problem 19

Hold your horses! The test hasn't finished yet.

Solution

Problem 20

Hold your horses! The test hasn't finished yet.

Solution

Problem 21

Hold your horses! The test hasn't finished yet.

Solution

Problem 22

Hold your horses! The test hasn't finished yet.

Solution

Problem 23

Hold your horses! The test hasn't finished yet.

Solution

Problem 24

Hold your horses! The test hasn't finished yet.

Solution

Problem 25

Hold your horses! The test hasn't finished yet.

Solution

See also

• CMC 12
• CMC 12 Problems and Solutions
• 2021 CMC 12A
• Mathematics competition resources