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mathematics form 4

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2 5 4+5 9 5 18−15 3 1 = M1 M1 A1 = − = = = 3 6 6 6 4 1 1 6 9 160+27 187 16 = 2 1 12 4 7 11 77 + = 2 77 30+539 569 187 - × = 17070 3 15 513 = 3150 630 − + = = 30 1 630 −315 = 3150 × 2. 1 2 6.458 × 10−2 2 ( ) 0.4327 2.541 + (2.311)2 =...

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  • November 2, 2023
  • 12
  • 2023/2024
  • Exam (elaborations)
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121/1
MATHEMATICS
Paper 1
Time: 2½hours




MATHEMATICS PAPER 1 MARKING
SCHEME
Kenya Certificate of Secondary Education
121/1
Paper 1
MATHEMATICS


1. 2 5 4+5 9 5 18−15 3 1 M1
=
= − = = =
3 6 6 6 21 12 4
4 1
7 11 77
16 9 160+27 187
16
=
+ = 3 10 30 30 5 × = M1 A1
3 15
2 77 30+539 569 513
187 −
19635 2565 =
- 6
3150
17070 630

+ = =
7 15 105 105 3150
30

1 630 −315
=
×
4 513 1026
2. 1 2
√ 6.458 × 10−2 2( ) M1
0.4327
2.541 + (2.311)2 M1
= 2.541 + 2(5.307) M1
= 2.541 + 10.61 A1
=13.155

, 3. log29 + log M1

M1

A1


4 M1 A1




= 7.007 units
5. 150
600 M1
3 3000
51 x 57000 x 100000
68 x 95 x 100
45
1 1

= 3 x 150 x 1000 M1
A1
= 450,000


2
6 x3 M1
x
3 1

( 2) ( 1) M1
A1
6

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