Prior to 2016/17 WJEC exams were provided at Higher and Foundation level. Questions at the beginning of the paper were easier than those later on. The papers below are the Foundation Tier papers so be aware that the last 3 or 4 questions are unlikely to appear on a new Foundation paper because they are designed for Intermediate level.
WJEC provided the two sample sets of exam papers below for the new exams introduced in 2016/17
Exam questions by topic
Maths - Numeracy
Application of Mathematics
(similar to GCSE Maths - Numeracy)
Old style GCSE Maths papers (still valid practice)