CUET General Test 2023 24 May Shift 3 PYQs

The sum of the fourth proportional of 4, 5, 16 and the mean proportional of 4, 16, is

The ratio of the rate of flow of water through pipes varies inversely, as the square of the radius of the pipes. What is the ratio of the rates of flow in two pipes of diameter 2 cm and 4 cm?

If $(x+y) : (x-y) = 7 : 3$, then find the ratio of $(x^2+y^2) : (x^2-y^2)$.