Vivian Ang
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Can please help to on the questions below.

Replies 0

Vivian Ang
Asked 9 years ago

SG chevron_right chevron_right

Replies 5
Aaron Hee

Guess and check

6 years ago
Meng Khim Goh

Question (a) Since all questions are answered, none were blank. The score was zero, so for every 2 questions answered correctly (+12), 3 questions were incorrect (-12). Total is 20 questions. Hence, 8 correct 12 wrong.

6 years ago
Meng Khim Goh

Question (b) For every correct answer (+6), he has an incorrect answer (-4). So for every pair of correct/incorrect answer, he scores +2. 8 pairs of +2 makes final score of 16. Hence, 4 questions were blank.

6 years ago
Soo Vei Li

6 years ago
Soo Vei Li

For (b), I am giving an idea of how to approach the problem.

6 years ago

Vivian Ang
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Fractions

Replies 1
Soo Vei Li

6 years ago

Vivian Ang
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Replies 3
Aaron Hee

6 years ago
Yeo See Yeong

6 years ago
Vivian Ang

Thanks

6 years ago

Aaron Hee
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Is there another method to solve this other than using parts and units... Which to some is actually simultaneous equation. Using that method will solve this easily but without much thinking ... Can a model be drawn for this??

Replies 4
Meng Khim Goh

If he sold 20 apples and 22 oranges, then he will still have 10% more oranges than apples. Then he sold the remainder 26 oranges, and end up with oranges being 90% of apples. Which means that 26 oranges = 20% (110%-90%) Hence, 10% = 13 oranges 90% = 117 oranges (ans)

6 years ago
Aaron Hee

Tks

6 years ago
Mavis Tan

Sorry Goh Meng Khim, but how did u conclude the first statement? Where did 22 oranges come from huh?

6 years ago
Meng Khim Goh

10% more oranges than 20 apples.

6 years ago

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