Daily Practice - Higher

A box plot has minimum 9, lower quartile 13, median 19, upper quartile 21 and maximum 27. Work out the interquartile range.

Write √27 in the form a √b, where b is as small as possible.Write sqrt(27) in the form a sqrt(b), where b is as small as possible.

For the curve y = -16/x, work out y when x = -4, and write down the equation of its vertical asymptote.

y is directly proportional to x². When x = 6, y = 216. Work out y when x = 2.y is directly proportional to x^2. When x = 6, y = 216. Work out y when x = 2.

Two similar solids have lengths in the ratio 1 : 2. The larger has a volume of 128 cm³. Work out the volume of the smaller.Two similar solids have lengths in the ratio 1 : 2. The larger has a volume of 128 cm^3. Work out the volume of the smaller.