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When correct---->+3
When wrong--->-1
When no answer --->no marks

Albert had 17 correct--->17x3=51(won't be needed)
Albert had 5 wrong-------> 1+3=4.  4x5+20
(This equation is so because Albert did not get the 3 marks and also got a mark deducted)
Albert did not answer 8 questions--------------->8x3=24

Full mark---->30x3=90
Marks lost--->20=24=44
Marks scored---> 90-44=46

Arithmetic expression--> (17x3)+(5x-1)+(8x0)=46

Ans =46 marks

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There are 3 questions.
- attempt the question in your Notebook (for future reference); you may type the expression in the padlet, too.
- WRITE the arithmetic expression that you use to calculate the final answer. Show complete working (do not skip steps)
- Take a photo of your answer

POSTING your answer:
- 1 Question, 1 Post
- At the title of the post, enter the Question Number

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Remember to write the arithmetic expression that you used to calculate the final answer.

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Remember to write the arithmetic expression that you used to calculate the final answer.

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Remember to write the arithmetic expression that you used to calculate the final answer.

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1--->3 times----->no point awarded
2--->4times------>36 points deducted
3--->7 times------>35 points awarded
4--->0 times------>no point awarded
5--->1 time-------->5 points awarded
6--->5 times--------> no points awarded

total marks deducted---->36+(4x5)+(3x5)+(5x5)=96
Total marks that can get--->20x5=100
Marks scored----->100-96=4

Ans=4 marks

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Q15:17x3+5x(-1)=46

Q17:  odd primes: 3, 5
even primes: 2
((3x7+5x1)x5)+(2x4x(-9))=58

Q18: If, 7 question correct and 7 question wrong, the total would be 7x2+7x(-1)=7.
The difference between actual total marks and assumed total marks is 10-7 which is 3 marks. So by transferring 1 wrong answer to 1 correct answer, the total marks will now be 8x2+6x(-1) which is 10 marks.

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(i)
Correct---->+2
Wrong--->-1
No answer--->no marks

Nadia--->14
14x2=28
marks deducted-->28-10=18
when you get a wrong answer you don't get the 2 marks and also get a mark deducted so it's 3 marks lost in a wrong question.

18/3=6
wrongly answered questions-->6
Correctly answered questions-->14-6=8

answer--->8 questions

(ii)
Full mark--->20x2=40
40--8=48
48 marks deducted
48/3=16(wrongly answered)
20-16=4

Answer--->16 wrong
4 correct

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15.
17x3=51
51-5=46

17.
2x(-9)=(-18)
7x5=35
1x5=5
35+5+(-18)=22

18.
i)14x2=28
28-10=18
1+2=3
18/3=6
14-6=8
ii)8/2=4
4 correct
0 wrong

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q15

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q17

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15.17x3-5=46

17.2x(-9)=(-18)
7x5=35
1x5=5
35+5+(-18)=22

18. i) total marks : 40 14x2=28
28-10=18
1+2=3
18/3=6
14-6=8
ans : 8
ii)8/2=4
Ans : 4 right 0 wrong

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Posted on 24Feb