Intermediate June 2019 Unit 1 Q14
14. Estimate the value of
\(\dfrac{30{\cdot}21 \times 1{\cdot}98^3}{0{\cdot}49}\) [3]
| Scheme | Marks | Comments |
|---|---|---|
| Sight of any TWO of 30, 2 or 0·5 OR Sight of any TWO of 30, 8 or 0·5 as appropriate approximations. | B1 | Allow 30·2 for 30. |
| \(\dfrac{30 \times 8}{0{\cdot}5}\) or equivalent. | M1 | Equivalent e.g. \(\dfrac{30 \times 2 \times 2 \times 2}{\tfrac{1}{2}}\) or \(\dfrac{30 \times 2^3}{0{\cdot}5}\) Must be seen, but allow if attempted calculation done in steps. M0 for exact calculation. |
| = 480 | A1 | C.A.O. Allow 483·2 if 30·2 used. |