Mathematics · Oct / Nov 2022 · Paper 42 · Question 1
0580
As printed in the paper
Show the answer and mark scheme
1(a)(i)[2]
75 [2]
M1 for 45 3 [× k] where k is 1, 5 or 8
1(a)(ii)[2]
2.332 oe [2]
M1 for 2.65 [million] × 12 1 − oe 100
or B1 for 0.318[million] seen
1(a)(iii)[2]
23 280 cao [2]
M1 for 6.25 100 × = x 1455 or better
1(a)(iv)[3]
1450 or 1449 to 1450 [3]
3 4
M2 for 1631 = k 1 100 + oe or better 3 4 +
or B1 for 1 100 oe seen n 4
or M1 for 1631 = k 1 100 + , n > 0 oe
1(b)(i)[1]
7 x oe 2 [1]
1(b)(ii)[2]
x + 12 7 x – 26 oe 2 final answer [2]
FT their (b)(i)
B1 for x + 12
B1 for their 7 x – 26 2
1(b)(iii)[4]
7 x 2 − 26 = 3(x + 12) oe leading to 124 [4]
M1dep for 7 x − = 3 × their (x + 12) oe their 26 2 M2dep for isolating x terms, dep on eqn with term in x and constant on each side and with a bracket or fraction. or M1dep for correctly removing brackets or dealing with fractions, dep on eqn with term in x and constant on each side and with a bracket or fraction.
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