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GCSE WJEC Maths Unit 1 (Intermediate Tier) – Summer 2018 | Full Non-Calculator Paper Walkthrough with Answers

This video is a full, step-by-step walkthrough of the WJEC GCSE Mathematics Unit 1 Intermediate (Summer 2018) non-calculator paper. We go question-by-question, explain the reasoning for method marks, and keep the working clear so you can mirror it in your own exam.

🔗 DOWNLOADS & RESOURCES:

📄 Blank Question Paper (PDF): https://mathvault.io/wjec/

✅ Official Mark Scheme (PDF): https://mathvault.io/wjec/

✍️ Worked Solutions (PDF): https://mathvault.io/wjec/

🎓 Book a 1-to-1 GCSE Maths Tutoring Session: [email protected]

📌 What’s Covered in This Video:

✅ Picking primes that sum to 32; LCM/“multiple of both”; factor of 51
✅ Quick unit conversions: km↔miles, lb↔kg, litres↔pints
✅ Table & graph of a straight line; plotting points; drawing y=2x−3
✅ Using a drawn diagonal as a square’s diagonal; listing all four vertices
✅ Basic probability: interpreting P(blue)=0.3, finding P(not blue), and counts from a total
✅ Isometric sketch of a cuboid 6×4×3 and its volume
✅ Linear sequences: linking T7 and T6; using nth term 2n−11
✅ Reasoning puzzle with bounds: 10%, a square half, and “not a multiple of 4”
✅ QWC: square perimeter → side; triangle area → unknown length
✅ Transformations: reflection in y=1; rotation (90° clockwise about the origin)
✅ Estimation & rounding for calculator checks; repeated % increase multiplier 1.04^7
✅ Venn diagram with two sets; completing regions; probability from totals
✅ Algebra: expanding & simplifying, solving linear equations (including fractions), factorising 12x+3xy
✅ Standard form: multiply/divide numbers like 2×10^−4 and 7.8×10^9
✅ Geometry: angle chasing in a triangle to find x
✅ Loci/regions with distance and angle constraints
✅ Congruence/similarity reasoning: proving AX=BX via isosceles triangles

⏱️ Timestamps for Quick Navigation:

0:00 – Intro & resources
0:09 – Q1 Primes summing to 32; multiple of 4 & 6; factor of 51
0:55 – Q1 Unit conversions (km↔miles, lb↔kg, L↔pints)
2:02 – Q2a Complete the value table
2:42 – Q2b Plot & draw the line y=2x−3
4:12 – Q2c Line as a square’s diagonal: list the four corner coordinates
5:18 – Q3a–c Probability: why 0.3 “blue” is misread; P(not blue); how many blue out of 50
6:47 – Q4a Isometric drawing of 6×4×3 cuboid
11:14 – Q4b Volume of the cuboid
11:36 – Q5a Sequence rule linking T7 and T6
12:26 – Q5b Using nth term 2n−11: find specific terms
13:00 – Q6 Find the whole number meeting all conditions (bounds & parity)
16:35 – Q7 (QWC) Square perimeter & triangle area → find DE
18:24 – Q8a Reflect shape S in the line y=1
19:16 – Q8b Single transformation from S to T (rotation)
19:48 – Q9a Best approximate value (estimation)
20:24 – Q9b Repeated 4% increase: correct multiplier 1.04^7
20:31 – Q9c Quick arithmetic check
20:59 – Q10a–c Venn diagram: complete regions & find a probability
23:33 – Q11a Expand & simplify; solve linear/fractional equations
28:07 – Q11b Factorise 12x+3xy
28:23 – Q12 Find angle x (angle sum reasoning)
29:17 – Q13 Loci/region: nearer to points & angle condition
30:46 – Q14 Geometry proof: show AX=BX (isosceles)

🎯 Who Is This For?

• Year 10 & 11 students taking GCSE Maths (Intermediate Tier)
• WJEC Unit 1 non-calculator practice & resits
• Teachers, parents & tutors supporting students with worked solutions

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