Numeracy Foundation November 2020 Unit 1 Q2
2. Brendon makes pendants for necklaces using circles.
The pendants come in a variety of sizes.
The first 3 sizes are shown below.
(a) How many circles are used to make a Size 5 pendant? [1]
(b) Which size of pendant has 17 circles? [1]
(c) Brendon has 26 circles left over.
What is the largest size of pendant that he can make? [1]
What is the largest size of pendant that he can make? [1]
(d)
Mary says,
To find the number of circles used in the next size up, you double the number of circles used in the size before it.
Is Mary correct?
Yes ☐ No ☐
Give a reason for your answer. [1]
| Scheme | Marks | Comments |
|---|---|---|
| 11 | B1 |
| Scheme | Marks | Comments |
|---|---|---|
| (size) 8 | B1 |
| Scheme | Marks | Comments |
|---|---|---|
| (size) 12 | B1 |
| Scheme | Marks | Comments |
|---|---|---|
| No and suitable reason given Eg ‘No because you increase by 2 each time’ ‘No because 5 isn’t double 3’ ‘No, the rule is +2 (not × 2)’ ‘No, because if you double the circles in size 2 you get 10 which isn’t 7 circles in size 3.’ ‘No because you just add on 2 to the number of circles before it.’ ‘No because you add the size number + size number + 1’ ‘No because to get size 3 you add 3 and 4’ | E1 | Allow ‘No because size 1 is 3, size 2 is 5 then size 3 is 7 so it isn’t doubling’ ‘No because it goes up by 2’ |