Mathematics · Oct / Nov 2020 · Paper 42 · Question 3
0580
As printed in the paper
Show the answer and mark scheme
3(a)(i)[2]
2210 or 2208 or 2208.2, or 2208.16… [2]
5 2
M1 for 2000 × 1 + oe 100
3(a)(ii)[2]
10.4 or 10.5 or 10.40 to 10.41 [2]
M1 for their(a)(i) − 2000 [ 100] × or 2000 5 their(a)(i) 2 × 100 + or 1 – 1 or 2000 100 5 2 1 + × 100 oe 100
3(a)(iii)[3]
12 [3]
B2 for 11.3 or 11.26 to 11.27 OR 11 2
M2 for [2000 ×] 1 + oe 100 12 2 or [2000 ×] 1 + oe seen 100 n 2
or M1 for [2000 ×] 1 + oe, n > 5 oe 100 = or > or ⩾ 2500 n 2 or for 2000 × 1 + 100 oe
3(b)[3]
490 cao [3]
16 4
M2 for p × 1 − = 255 oe soi by 100 490.0... n 4
or M1 for p × 1 − = 255 oe, 100 n > 1 oe
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