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Suggestion:

(2y + 3) kg A1

2y + 3 kg A0.5

3 + 2y kg A0.5

3kg + 2y A0.5

2y + 3 A0.5

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Alternative answer

Accept equivalent forms

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Part (a) Confirm there is a half mark deduction? If there is, what kind of deduction does this fall under? Thanks!

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Prelims Ans Key 22 Aug 5 pm

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PHPPS P6 Math Prelim 2025 Answer Key_22 Aug_5pm

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(a). Method is correct, but should be penalised for wrong mathematical statement. Should this be M1-0.5 + A1 = Total 1.5 instead of A1 only?

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Part (b) can give M1?

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Units should be litres only. But in this case, can we accept litres per minute since the question asked for litres in one minute?

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Why is this answer 0.5 marks...

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... and this one 0 marks?

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(b) should be M0A0. Wrong method because student used distance travelled in 45 HOURS divided by extra distance travelled in an hour.

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Q1: There is an additional step behind the M1 which resulted in the wrong answer. Still award the M1 or no M1?

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Alternative method for P1 Q28:

Total Area of Figure + 4x10 rectangle = 6x6 + 22x14 + 10x10 +10x4 = 484

Smaller triangle to take away --> 1/2 x 6 x 28 = 84

Larger triangle to take away --> 1/2 x 14 x 32 = 224

Shaded area = 484 - 84 - 224 (M1) = 176 (A1)

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Q29b

Positive evidence of A = 540 and B = 500 students before A1 of School A to be awarded.

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Q30

Label to penalise 0.5 if wrongly written for both figures.

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Dear all, please check (a)

Units need to be L/min, if student only write L as units, deduct 1/2m please since it's unit of rate. Thanks!

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For this qn, student used 60 instead of 64. Can this have 1 method mark?

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Student used 60 instead of 64. Can this be award m1?

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Q30 Note alternative answer

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Updated marks allocation for Q14(b)

Method 1

M1 to find 8400 as total salary

M1 to express 420/8400 as fraction

A1 for accurate answer

Method 2

M1 to find 20u as total salary

M1 to express 1/20 as fraction

A1 for accurate answer

Please help to relook to ensure method marks are given based on this allocation. Thank you!

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Alt solution

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Latest Answer Key 29 August @12noon

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PHPPS P6 Math Prelim 2025 Answer Key_Final(Updates)_290825_1200