Forming Equations: WJEC GCSE Foundation June 2023 Unit 1 Q15

Foundation June 2023 Unit 1 Q15

WJECFoundationCurrent spec3 marksForming Equations

15. Rhian is \(n\) years old.
Samir is 7 years younger than Rhian.
Nigel is twice as old as Samir.

Write down an expression, in terms of \(n\), for Nigel’s age. [3]

Nigel’s age ……………………

Mark scheme

Scheme

Marks

Comments

\(2(n - 7)\) or equivalent e.g. \(2n - 14\).

Answer space takes precedence.

For B3, accept as a final answer of:

Award B2 if incorrect subsequent working for one of the above.

Award B2 for sight of one of the following:

missing brackets	error in Samir’s age
\(2 \times n - 7\) \(n - 7 \times 2\)	\(2(n + 7)\) \(2 \times (n + 7)\) \((n + 7)2\) \((n + 7) \times 2\) \(2(7 - n)\) \(2 \times (7 - n)\) \((7 - n)2\) \((7 - n) \times 2\) \(2n + 14\) \(14 - 2n\)

Award B1 for sight of one of the following:

Allow use a different letter for \(n\).