The 10th term of the sequence 3, 7, 11, … is:

sin²θ + cos²θ = ?

d/dx (x³) = ?

The sum of the first 20 natural numbers is:

If log 2 ≈ 0.301, log 8 ≈ ?

e⁰ = ?

The geometric sequence 2, 6, 18 has ratio:

lim (x→0) (sin x)/x = ?

d/dx (5x² + 3x) = ?

cos 60° = ?

The gradient of y = x² at x = 2 is:

How many ways can 3 students line up?