Four-digit numbers are formed from the digits 1, 2, 3, 4, 7, 9.
How many 4-digit numbers can be formed if none of the digits 1, 2, 3, 4, 7, 9 can be repeated?
The mark scheme is shown once you've answered.
Practise this question1, 2, 3, 4, 7, 9 can all be repeated?[2 marks]75\% of the time and the father scores 4 out of…[6 marks]h, k \in \mathbb{R} such that 3 + 4\mathrm{i} is a root of the quadratic equation z^2 + hz + k = 0.[6 marks](\cos \theta + \mathrm{i} \sin \theta)^3 to show that \cos 3\theta = 4\cos^3 \theta - 3\cos \theta.[6 marks]More practice: the rest of this paper · more Counting questions · all CAPE Pure Mathematics Unit 2 past papers