What is 30% of 150 plus 10% of 50?

Evaluate the integral of x dx from 0 to 4

What is the surface area of a sphere with radius 7 cm using π = 22/7?

What is 50% of 360?

A sum doubles itself in 8 years at simple interest. What is the rate?

What is the sum of squares formula: a² + b² equals?

Using the BODMAS rule, solve: (12 ÷ 3 + 2) × (5 − 2) = ?

Using the BODMAS rule, solve: (4 + 4) × (3 − 1) = ?

A man walks 4 km North then 3 km East. How far is he from the start?

Using the BODMAS rule, solve: (9 + 3) ÷ 3 + 2 = ?

Simplify: (a² - b²) divided by (a - b)