Daily Practice - Higher

1 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.

A box plot has minimum 14, lower quartile 21, median 25, upper quartile 34 and maximum 37. Work out the interquartile range.

Work out (12 x 10⁶) / (4 x 10⁴). Give your answer in standard form.Work out (12 x 10^6) / (4 x 10^4). Give your answer in standard form.

The curve y = 5^x is drawn. Work out y when x = 4, and write down where the curve crosses the y-axis.The curve y = 5^x is drawn. Work out y when x = 4, and write down where the curve crosses the y-axis.

y is directly proportional to x². When x = 4, y = 48. Work out y when x = 2.y is directly proportional to x^2. When x = 4, y = 48. Work out y when x = 2.