Grade 8

EASY QUESTION

A lightbulb in a 120 V circuit is switched on, and a current of 0.50 A flows through the filament. What is the resistance of the bulb?

• A. 140

• B. 240

• C. 114

• D. 214

EASY QUESTION

Which of the following is a conductor?

• A. Rubber

• B. Glass

• C. Plastic

• D. Metal

EASY QUESTION

What is the GCF of the following expression? 8x³y² - 12x²y³

• A. 4x³y²

• B. 2x²y²

• C. 4x²y²

• D. 8x⁵y⁵

EASY QUESTION

What is the GCF of: 6m³n² - 9m²n³ + 12m⁴n

• A. 3m²n

• B. 6m³n³

• C. 3m²n³

• D. 12m⁴n

AVERAGE QUESTION

Factor the difference of two squares expression: 16a⁶ - 25b⁴

• A. (4a³ + 5b²) (4a³ - 5b²)

• B. (16a³ + 25b²) (16a³ - 25b²)

• C. (4a³ + 5b²)(4a³ + 5b²)

• D. (16a³ - 25b²)(16a³ + 25b²)

AVERAGE QUESTION

Factor the expression as the difference of two cubes: 27u⁹ - 1

• A. (3u³ - 1)(9u⁶ + 3u³ + 1)

• B. (3u³ - 1)(9u⁶ - 3u³ + 1)

• 1. C. (3u⁶ - 1)(9u³ + 3u³ + 1)

• D. (3u³ - 1)(9u⁶ + 3u³ - 1)

AVERAGE QUESTION

Which is a false statement on Ohm’s law?

• A. The unit of resistance is ohm.

• B. Voltage is current multiplied to resistance.

• C. High resistance means less current.

• D. Power is voltage times resistance