Foundation November 2022 Paper 3 Q10
10 Here are the first three terms of a sequence.
\[20 \qquad 16 \qquad 13\](i) Write down two numbers that could be the 4th and 5th terms of this sequence. (1)
(ii) Write down the rule you used to get your numbers. (1)
| Answer | Mark | Mark scheme |
|---|---|---|
| (i) terms given | B1 | states two terms eg 11, 10 or 9, 6 |
| (ii) explanation | C1 | explanation Acceptable examples Take away 2 then 1; take away 4 then 3 The difference goes down by 1 each time \(-4, -3;\ -2, -1\) The differences are 4 and 3; the differences are 2 and 1 Not acceptable examples It goes down by 1 each time An algebraic rule |
Additional guidance
(i) May be written on the sequence with no contradiction elsewhere