Sequences: WJEC GCSE Foundation November 2016 Unit 1 Q15

Foundation November 2016 Unit 1 Q15

WJECFoundationCurrent spec5 marksSequences Solving Simple Equations

15.

(a) Write down the next two numbers in the following sequence. [2]

33 26 19 12 ……… ………

(b) Solve the equation \(13y - 5 = 9y + 27\). [3]

Mark scheme (a)

Scheme	Marks	Comments
5 −2	B2	B1 for 5. B1 F.T. for ‘their 5’ – 7 if negative.

Mark scheme (b)

Scheme	Marks	Comments
\(13y - 9y = 27 + 5\)	B1	To gain the first two B1 marks there must be an equation. Accept embedded answer. F.T. until 2^nd error.
\(4y = 32\)	B1
\(y = 8\)	B1	32/4 not accepted as final answer. If FT leads to a whole number answer, it must be shown as a whole number. Otherwise accept a fraction. Mark final answer.