1. What is (12 + 8) × 2?
Options:
a) 30
b) 32
c) 36
d) 40
✅ Answer: 40
Explanation:
Follow the order of operations (BODMAS/PEMDAS):
- Step 1: Add first → (12 + 8) = 20
- Step 2: Multiply → 20 × 2 = 40
2. Solve for x: 5x – 7 = 18
Options:
a) 3
b) 4
c) 5
d) 6
✅ Answer: 5
Explanation:
To find x, isolate it step by step:
- Step 1: Add 7 to both sides → 5x = 18 + 7
- Step 2: Simplify → 5x = 25
- Step 3: Divide by 5 → x = 25 ÷ 5 = 5
3. The sum of three consecutive even numbers is 54. What is the smallest number?
Options:
a) 14
b) 16
c) 18
d) 20
✅ Answer: 16
Explanation:
Let the three consecutive even numbers be x, x+2, x+4.
- Equation: x + (x+2) + (x+4) = 54
- Simplify: 3x + 6 = 54
- Subtract 6: 3x = 48
- Divide by 3: x = 16
The smallest number is 16.
4. If a triangle has angles of 40° and 65°, what is the measure of the third angle?
Options:
a) 65°
b) 75°
c) 85°
d) 95°
✅ Answer: 75°
Explanation:
The sum of all angles in a triangle is 180°.
- Equation: 40° + 65° + ? = 180°
- Solve: 180° – (40° + 65°) = 75°
5. A store is offering a 25% discount on a $120 item. What is the sale price?
Options:
a) $80
b) $90
c) $95
d) $100
✅ Answer: $90
Explanation:
- Step 1: Find 25% of $120 → (25/100) × 120 = 30
- Step 2: Subtract from original price → 120 – 30 = 90
6. If 4 pencils cost $6, how much do 10 pencils cost?
Options:
a) $12
b) $14
c) $15
d) $18
✅ Answer: $15
Explanation:
- Step 1: Find the cost of 1 pencil → $6 ÷ 4 = $1.50
- Step 2: Multiply by 10 → 10 × $1.50 = $15
7. A train travels 240 km in 3 hours. What is its average speed?
Options:
a) 60 km/h
b) 70 km/h
c) 75 km/h
d) 80 km/h
✅ Answer: 80 km/h
Explanation:
- Formula: Speed = Distance ÷ Time
- Step 1: 240 km ÷ 3 hours = 80 km/h
8. What is the square root of 144?
Options:
a) 10
b) 11
c) 12
d) 13
✅ Answer: 12
Explanation:
- Step 1: Identify a number that, when multiplied by itself, gives 144.
- Step 2: 12 × 12 = 144
- So, √144 = 12
9. Convert 3/4 into a decimal.
Options:
a) 0.25
b) 0.5
c) 0.75
d) 1.25
✅ Answer: 0.75
Explanation:
- Step 1: Divide 3 by 4 → 3 ÷ 4 = 0.75
10. If the perimeter of a square is 36 cm, what is the length of one side?
Options:
a) 6 cm
b) 8 cm
c) 9 cm
d) 12 cm
✅ Answer: 9 cm
Explanation:
- Formula: Perimeter of a square = 4 × Side
- Step 1: Set up the equation → 4s = 36
- Step 2: Divide by 4 → s = 36 ÷ 4 = 9 cm