Daily Practice - Higher Plus

A bag holds 4 red and 6 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?

A histogram has four 20-wide classes from 0, with frequency densities 3, 2, 1, 0.5. Which class contains the median?

x = 162 and y = 49, each correct to the nearest whole number. Work out the upper bound of x - y.

In an algebraic proof, how would you write two consecutive odd numbers in terms of an integer n?

y is inversely proportional to x². When x = 2, y = 75. Work out y when x = 5.y is inversely proportional to x^2. When x = 2, y = 75. Work out y when x = 5.