IGCSE
EDEXCEL
Mathematics A Higher (International)
3 Marks
QP-Math1-202001-P2HR · Question 25
Question (excerpt):
25 N is a multiple of 5 A = N + 1 B = N – 1 Prove, using algebra, that A2 – B2 is always a multiple of 20
25 N is a multiple of 5 A = N + 1 B = N – 1 Prove, using algebra, that A2 – B2 is always a multiple of 20
Question Slice Image
Official Mark Scheme & Solution
The official answer and mark scheme are available to signed-in users in the PaperAce App.