Intermediate November 2018 Unit 2 Q4
4. Choose any number.
Show that \(\dfrac{1}{5}\) of 25% of your number = \(\dfrac{1}{4}\) of 20% of your number. [4]
| Scheme | Marks | Comments |
|---|---|---|
| A number ‘n’ is chosen. 0·25 × n (or equivalent) OR 0·2 × n (or equivalent) | M1 | |
| ÷ 5 (or equivalent) OR ÷ 4 (or equivalent) | m1 | For an appropriate 2nd step. |
| = \(\dfrac{n}{20}\) = \(\dfrac{n}{20}\) | A2 | A1 for each correct value (C.A.O.). Dependent on both M1 and m1. |
| If no number ‘n’ chosen. | Award | |
| 1/5 of 25% = 5% AND 1/4 of 20% = 5% with no further incorrect work | SC4 | |
| 1/5 of 25% = 5 AND 1/4 of 20% = 5 ISW | SC2 | |
| 1/5 of 25% = 5% OR 1/4 of 20% = 5% ISW | SC1 No marks for showing just one of the following. 1/5 of 25% = 5 OR 1/4 of 20% = 5 |