BECE Math 3 — Questions and Answers
Question 1: A triangle has angles measuring 50° and 70°. What is the third angle?
- 40°
- 60° (Correct answer)
- 80°
- 70°
Correct answer: 60°
Angles in a triangle sum to 180°; 180 − 50 − 70 = 60°.
Question 2: What is the LCM of 4, 6, and 8?
- 12
- 24 (Correct answer)
- 16
- 48
Correct answer: 24
The smallest number divisible by 4, 6, and 8 is 24.
Question 3: Express 0.045 as a fraction in its simplest form.
- 9/200 (Correct answer)
- 45/100
- 9/20
- 45/1000
Correct answer: 9/200
0.045 = 45/1000; simplify by dividing by 5 twice: 9/200.
Question 4: If y = 2x − 3, what is y when x = 5?
- 7 (Correct answer)
- 13
- 4
- 9
Correct answer: 7
Substitute x = 5: y = 2(5) − 3 = 10 − 3 = 7.
Question 5: A bag contains 3 red, 4 blue, and 5 green balls. What is the probability of picking a blue ball?
- 1/3 (Correct answer)
- 4/11
- 1/4
- 4/12
Correct answer: 1/3
Total = 12 balls; P(blue) = 4/12 = 1/3.
Question 6: What is the perimeter of a square with side 9 cm?
- 18 cm
- 27 cm
- 36 cm (Correct answer)
- 81 cm
Correct answer: 36 cm
Perimeter of a square = 4 × side = 4 × 9 = 36 cm.
Question 7: Evaluate: 5! (5 factorial)
- 20
- 60
- 100
- 120 (Correct answer)
Correct answer: 120
5! = 5 × 4 × 3 × 2 × 1 = 120.
BECE Math 3
A triangle has angles measuring 50° and 70°.
What is the third angle?