Solve: 3x − 5 = 10

The ratio 12 : 18 in simplest form is:

2⁴ × 2² = ?

Angles of a triangle sum to:

The mean of 4, 7, 9, 12 is:

If y = 2x + 1 and x = 3, then y = ?

Expand: 3(a + 4)

A map scale is 1:50,000. 2 cm on the map is:

Which is a right angle?

√81 = ?

15% of 400 = ?

A worker earns 40,000 riel/day. In 6 days he earns: