Math Fun Facts

1. What is the sum of angles in a triangle?

• A. 90°
• B. 120°
• C. 180° ✓
• D. 360°

💡 The three interior angles of any triangle always add up to exactly 180°.

2. What is 2 to the power of 10?

• A. 512
• B. 1000
• C. 1024 ✓
• D. 2048

💡 2¹⁰ = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 = 1024.

3. What is the number that when multiplied by any number gives that same number?

• B. 1 ✓
• C. 2
• D. 10

💡 1 is the multiplicative identity. Any number × 1 = that number. For example 7 × 1 = 7.

4. What comes after a trillion?

• A. Quadrillion ✓
• B. Billion
• C. Zillion
• D. Quintillion

💡 The order is: million, billion, trillion, quadrillion, quintillion. Each is 1,000 times the previous.

5. What is 5 factorial (5!)?

• A. 60
• B. 100
• C. 120 ✓
• D. 150

💡 5! = 5 × 4 × 3 × 2 × 1 = 120. Factorial means multiply all integers down to 1.

6. What is the Roman numeral for 10?

• A. V
• B. VIII
• C. X ✓
• D. XII

💡 X is the Roman numeral for 10. V = 5, VIII = 8, XII = 12.

7. How many zeros does one million have?

• A. 4
• B. 5
• C. 6 ✓
• D. 7

💡 One million = 1,000,000 — it has 6 zeros.

8. What is the result of any number multiplied by zero?

• A. 1
• B. The number itself
• C. Infinity

💡 Any number multiplied by 0 equals 0. This is one of the fundamental rules of arithmetic.

9. What is the value of Pi (π) approximately?

• A. 2.14
• B. 3.14 ✓
• C. 4.14
• D. 5.14

💡 Pi (π) ≈ 3.14159. It is the ratio of a circle's circumference to its diameter.

10. What do you call a number that can only be divided by 1 and itself?

• A. Even number
• B. Composite number
• C. Odd number
• D. Prime number ✓

💡 A prime number has exactly two factors: 1 and itself. Examples: 2, 3, 5, 7, 11.