Daily Practice - Higher Plus

A block has mass 460 g (to the nearest 10 g) and volume 10 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 460 g (to the nearest 10 g) and volume 10 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

In an algebraic proof, how would you write the square of an odd number in terms of an integer n?

y is inversely proportional to x². When x = 2, y = 100. Work out y when x = 5.y is inversely proportional to x^2. When x = 2, y = 100. Work out y when x = 5.

A triangle has sides 4 cm, 6 cm and 7 cm. Work out the angle opposite the 4 cm side, to 1 decimal place.

A bag holds 5 red and n blue counters. The probability of taking a red is 5/7. Work out n.