2023 GSS 3E EOY Math Express Markers Report

Markers’ Report Subject : Mathematics Paper No : 1 Level/Stream : Secondary 3 Express Marker : Mark Lim & Chin Zhi Hao General Comments (for difficulty of paper, etc): The paper is generally difficult for the lower ability students. Graph reading and sketching prove challenging for the students. Qn Markers Feedback / Comments / Misconception / Errors Total possible mark for each question Put a  if the comment applies to some of the students in the class. Put  if the comment applies to > 50% of students All classes 3-7 3-8 3-9 +SBB 3-10 3-11 1 - Well done for this question - Students place 14%6 at the front 2   2 - Students uses compound interest to evaluate - Students who uses simple interest formula, stopped when they found $12574.20 2    3 - Done well for changing all numbers to 1 s.f. - Changing the final answer back of 0.25 to 0.3 - Students changing to 1 s.f. e.g. 4.45 to 4.00 3    4a Students conversion from only multiplying by the factor of  1  4b - Generally done well - Students conversion from only multiplying by the factor of 180 1    5 - Students can apply the formula for length segment but not able to manipulate to get the two required answers 3   6 - Generally done well - Students did not provide the correct rounding to 1 d.p. 2  

7 - Student did not apply the law of indices but instead multiply 1 749 to get the numerical number - Student attempted to guess the power of x from 0.05399 7 x 2   8 - Students stopped when they found the compound interest of $8499.3496 - Use of simple interest - Students are not able to correct the answers to nearest cents 3    9a - Mixed up with 1y x 1  9b - Generally done well 1  9c - Mixed up with 1y x 1  10 - Students used general formula to factorise 22 9 5 0xx   - Students did not reject the answer when x = −5 which would be good if indicated 3   11a - Generally done well - Students changed the inequalities sign when there was no multiplication / division of negative numbers 1   11b - Students indicated 1 as one of the prime numbers hence resulted in giving the wrong conclusion to the claims 2  12a - Students were not able to give the negative ratio for the cosine ratio 1  12b - Use of sine rule / cosine rule when a right-angle triangle is given 2   13a - Simplification of indices (e.g. 6 6 0a a a  ) resulted in lost of marks - Students did not simplify 0b 2   

13b - Generally done well - Marks were no wards if there are negative power (e.g. 5 55 or 0.2 aa   ) 2    14 - Not able to show the proper presentation in statement format - Incorrect or no reasons given (e.g. similar angle, similar side) - Students assumed that RC = 3 and used that in their prov