CSEC Mathematics January 2021 Paper 1/ Full Solutions
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- Опубліковано 27 вер 2024
- January 2021 resist paper solutions for 58 questions.
All the best in your exams!
NB: The focus is on the questions and not the order of the questions.
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Download the paper from this site ( under construction) sites.google.com/view/mathsmeter/past-papers?authuser=0
Thanks
U missed question 18?
Firstly, thank you so much for your dedication to providing solutions!! Much appreciation!
For number 46:
If you make graph diagrams corresponding to the respective pairs added to the given set,
A, B, D would pass the vertical line test, so including all those points would keep the given set a function.
A: {(-2, 7), (4, 6), (10, 4), (1, 3)} pass
B: {(-2, 7), (4, 6), (10, 4), (0, 4)} pass
D: {(-2, 7), (4, 6), (10, 4), (-8, 10)} pass
Including choice C, we'd have a diagram that fails the vertical line test at -2
C: C: {(-2, 7), (4, 6), (10, 4), (-2, 8)} fail
So choice (C) would form a relation that is not a function.
Every x would not have a unique y [assuming we're dealing with ordered pairs (x, y)]
With choice B we'd have a not one to one function, but it's still a function
It isn't specified which way the arrows would go for the mapping
I'm assuming the first number maps to the second, which is convention
But if it's the other way around, B is correct
Hmm, so which is it?
I think stating that we're dealing with "ordered pairs" implies the 1st is mapped to the 2nd,
that is, the 2nd number of the pair is a function of the first: so choice C would be my answer
With some some ambiguity here, I think this question could be a bit unfair to students.
Maybe it could be stated in a way that would remove any doubts~
How u work the paper all over the place its confusing?
I didn't think it mattered because the questions are not leading questions, all are separate so it doesn't matter the order. But your feedback is noted.
@@MathsMeter ok i understand. But anyways i am benefitting alot from your channel
Do u know where i gan get 2020 to 2021 past papers or send them to me ? Thank you. This channel help me alot with the multiple choice papers. Once again thank you so much miss i am writing in 2022.
@@jenapersaud2053 email me at mathsmeter@gmail.com. I will send them
@@MathsMeter ok thank you so much
For question 42 my shortcut was dividing 60 by 2 which will give you 30 and then adding the number for the bars so 3 kg = 11, 4 kilograms = 10 , 5 kg = 9 add them all together so we get 30 which would be in the 3rd bar which is 5 kg and add the 4th bar which is 6 kg and the divide them by 2 since 60 does not have a middle number
for number 14 you could have just divide the 100 by 2 which leaves 50 then divide the 180 by 50 which will result in the answer 3.6
Beautiful
36%+48%=84
100%-84=16
for number my shortcut was that i added the 36% nd the 48% to begin with nd then subtracted it from 100% instead of doing the the long way miss showed
Well done
u forget #18
Hiii for number 43, 7.8- 2.2 is equal to 5.6 not 4.6. Will the answer remain the same?
Yes. It looked at it again the Q3 looks like 7.4 and Q1 is 2.4 by estimation as I can't see the question well. So it would be five.
Good job!…but please do the paper in order so we won’t skip questions. It’s a bit confusing
I am lost.. At the mode part.. You put A.. (5.) Mode.. Is the number that appears the most.. Why 5 is the answer shouldnt it be 9..
Define the mode also has the one with the highest frequency. In this case our frequency is the number of students, the item is the number of books, so 13 students bought 5 books, if we were to list out the amount of books bought, we would realize that 5 books bought occurs 13 times, as opposed to 3,4 and 7 books bought which occurs 9 times. What I think you have confused the frequency (no of students) with the item. So because 9 occurs 3 times in frequency doesn't make it mode. The highest frequency is 13 and that matches 5 books bought. I hope this cleared it up.
@@MathsMeter okay i guess i get it alittle, despite i always get confuse with the mode, median.
Real helpful 👌
Miss you keep class ? I would want little assistance please
Good evening send me an email mathsmeter@gmail.com
@@MathsMeter okay
Thanks
yes well done teacher thanks learn a lots am looking forward to my exam tomorrow question 57 am puzzling with my answer is D180 /3x can you please look into it please thanks
So we know that all angles in the triangle add to give 180°. Thus ∠a + ∠b + ∠c = 180°. So let's try a non- algebraic question, suppose the ∠a = 40, and ∠b= 60, how would we find the ∠c, we would find the sum of ∠'s a and b and then subtract that total from 180, it would look like this 180 - (40 + 60) = 80°.
* If the question said that all angles in the triangle were equal then your choice would be D.
Pepe’s fac#vdaccvp
U forgot #18
Thank you miss for taking your time and explain the work your amazing and your helping a lot of students thank you a lot I appreciate this 😍🙇👏👏
Thanks for the motivation
Your welcome miss
I hated maths because I never understand it and I'm bad in this subject area I got a grade 4 but now I'm learning a lot than when I was in school. Im understanding the problem and working the solution thank to u miss ❤💖💖
Be patient with yourself. Keep practicing.
@@MathsMeter I will 😌
i learn 10 new ting today 😁😁🥳🥳🥳🥳🤙👊👏🙏✍👍👍👍
shortcut: I just add the two percentages and minus it from 100 and got the same 16
I'm a little confused with number 7 isn't the answer supposes to be 2 or did i mistaken it for another question
The questions in this video were not done in order, however the question marked 7 ,the sets question about P intersect q union s is that the one you are referring to?
@@MathsMeter i think soo that is why i was so confused
Will like to do the paper then come to check the answers, do you have a link or copy of this paper. Thank you.
Send me an email at mathsmeter@gmail.com
I Need those past paper too
Can I have these papers too