 Education › Re: Nairalanders Maths Help Needed Pls. by Cuterboy(m): 1:15pm On May 10, 2020 |
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| Education › Re: How To Achieve High Scores On The GRE by Cuterboy(m): 1:14pm On May 10, 2020 |
Quoran:
GRE QUANT TIPS
1.In Quantitative Comparison questions, try numbers in this order: 0,1,2,-2,1/2. I learned this from NOVA GRE book. It works just fine.
2.Quantitative Comparison questions are half of a GRE Quant section (10 in number).
3.In Quantitative Comparison questions, before you select an answer, try at least two numbers.
4.Know the rules of divisibility. It will help.
5.Pay special attention to words like ‘the greatest possible’ in quantitative comparison questions. For instance, the greatest possible number of points common to a triangle and a circle is ____? It is more likely than many of us will pick three. Six points is also possible. Just remember that the triangle must not be inscribed in the circle. Six points will pass through the circumference.
6.Do not assume more than what is given especially in Quantitative Comparison questions.
7.Special triangles: 30-60-90 :1:√3:2;45-45-90:1:1:√2 ; The longer the side, the larger the angle opposite it and vice versa.
8.Supplementary angles 180, Complementary angles 90. Parallel lines have the same slope. Perpendicular lines – Negative reciprocal of the original line. (This appeared on my GRE). Know the equation of a line in different forms.
9.Learn all those Mensuration stuff.
10.Once a calculation is going on for too long, check your method again. There might be something wrong.
11.Be careful when multiplying or dividing by a negative number in inequality problems. Never do this in a Quantitative Comparison question.
12. PEMDAS – Parentheses-Exponents-Division-Mulitplication-Addition-Subtraction.
13.Integer 0 is neither positive nor negative.
14. 0 to 9 inclusive is 10 integers.
15. If a is even, b is odd, then a+2b is even, 2a+b is odd, ab is even etc. These kinds of questions are common.
16.P(A or B) =P(A) + P(B) Mutually exclusive ; P(A or B) =P(A) + P(B) –P(A and B) Independent
17.Know Mean, mode and median and how numbers can affect them.
18.In word problems, use 100 for percentages. Do not use a number if the word problem has a fraction. I think Princeton Review covers this.
19.How many multiples of 7 are there between 100 and 150? 7 not 6. 147-105=42. 42/7 =6. 6+1 =7.
20.10 evenly spaced tick marks on a number line is 9 intervals not 10.
21.Any three consecutive integers will always contain a multiple of 3.
22. Rate x Time = Distance. Draw a table and solve all rate questions like this. Manhattan covers this well.
23. Pay attention to units, scales and values along the X and Y axes in graphs.
24. Average degree per side = (180(n-2))/n.
25.0 is a number.
26.How many square pieces can you get from a board of 18 by 30 inches without wasting any of the board? Answer: 15. Greatest divisor of 18 and 30 is 6. 18/6=3; 30/6=5; 3X5 =15. (Simple questions like this can waste your time).
27.Increase something by 250% is 3.5 times the number not 2.5 times the number.
28.Standard deviation questions are not usually difficult. Just know how it affects the mean.
29.Study the Official GRE test guide. You will not go wrong if you follow it strictly. Use other books (Magoosh, Manhattan, Princeton) for more tips , tricks and sample questions.
30.The key to scoring well on the GRE is to do well in the first section. The first section is usually easy (Assuming you prepared really well). This section is easy but tricky. If you practice well enough, you will observe that this is the section were you will finish with time to spare. On your sketch paper, I will advise that you solve your questions sequentially. Peradventure you need to go back to a question or review it, you can easily track your mistakes.
31. Pace well. Do not spend too much time on a particular question. I finished with some minutes to spare. I was able to review up to 10 questions and I can remember changing my mind on two answers I had previously selected. I did score 20/20 in that section.
32.Do not waste time on any question. This is very easy to say really. I made the same mistake in my second section. I wasted time on the first few questions as they were difficult. This affected my score. I noticed the easier questions were at the bottom.
33. The GRE is section adaptive. If you do well in the first section, you get a more difficult second section and vice-versa. This is aimed at making test takers get at least 150 marks. It follows a normal distribution. Those doing well are ‘dragged’ to 150. Those not scoring well are ‘helped’ to 150. (Additional probably unnecessary information lol).
34.From proven research, for you to get a more difficult second section, you need to score at least 14 in the Quant and 12 in the Verbal. The more difficult section carries more weight than a normal section. The more difficult questions you get correctly in the second section, you more points you have.
35.The scoring is not linear. I had 20 in the first section and 15 in the second section yet I had 166. In my Verbal, I had 14/20 in both sections yet I scored 161. Same thing I noticed with my friends and in my first attempt.
36.If you score 10/20 in the first Quant section and 16/20 in the next section, you will score 153. If you score 16/20 in the first section and 10/20 in the section, you will score 156. DO YOUR BEST IN THE FIRST SECTION. Verbal is more difficult than the Quant.
37.Peradventure you do not do well in the first section (You will know because the questions will be easy; It happened to me during my first attempt), you can still blast the second section. Just take it easy and do you best.
38.The on screen calculator can slow you down. Use it only if you really need it.
39.You can learn to back-solve questions. It helps when you are clueless on how to solve certain questions. I think Princeton covers this a lot.
40.I make mistakes more when I rush and do not take time to read the question well. Do not also try to solve questions mentally. Write it down to avoid errors.
41. Do a lot of practice tests. Under normal conditions, we will all score well. A timed practice test is the real deal. PowerPrep, Manhattan, Kaplan are good in this regard.
42. The GRE has a structure: For the Quant, you get 4 easy questions, 12 medium questions and 4 hard questions on your first section. Look at the Official GRE guide for more on question difficulty.
43.Some people are that good that some tips did not work for them. If you are like me that needed to retake the test, you have to pay attention to many things to avoid getting the same poor score.
44.By the way, there is nothing like a bad score. It all depends on what you want to use it for.
All the best folks. Pardon my errors.
Check out this particular example on this topic, i found it veeeeeeeeeeeeeeeeeeery helpful  . It actually shows the rule fo "11"
http://9jababa.com/junior-mathematics-where-are-the-maths-gurus/Check it out
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| Education › Re: Learn How Do Math Quickly With These Divisibility Tips -samimath.com by Cuterboy(m): 12:59pm On May 10, 2020 |
originalKsp:
The following are the divisibility rules for numbers from 2 through 10. It is helpful to know these rules because it saves time when doing calculations involving division.
****************************************
A NUMBER IS DIVISIBLE BY
2
If the last digit is even
3
If the sum of the digits is divisible by 3
4
If the last two digits form a number which is divisible by 4
5
If the last digit is a 5 or a 0
6
If the number is divisible by both 3 and 2
OR
If the unit digit (last digit) is even and the sum of the digits form a number divisible by 3
7
Take the last digit, double it, and subtract it from the rest of the number;
if the answer is divisible by 7 (including 0),
8
[b] If the last three digits form a number divisible by 8
9
If the sum of the digits is divisible by 9
10
If the number ends in 0
****************************************
See detailed examples of application of these laws here: http://samimath.com/math-tips-divisibility-rules/
Check out this particular example on this topic, i found it veeeeeeeeeeeeeeeeeeery helpful . It actually shows the rule fo "11"
http://9jababa.com/junior-mathematics-where-are-the-maths-gurus/Check it out
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| Education › Re: How To Achieve High Scores On The GRE by Cuterboy(m): 12:54pm On May 10, 2020 |
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| Education › Re: 12-Year-Old Chika Ofili Awarded In UK For His New Discovery In Maths by Cuterboy(m): 12:52pm On May 10, 2020*. Modified: 1:13pm On May 10, 2020 |
sangresan:
Continue to fool yourself...New formula ko, new mathematical law ni.....
Most of those who see this as a big deal are those who don't know much about Mathematics...This is high school maths and 7 has many divisibility rules. This particular one has already been written about by many number theorists....I'm surprised that the UK school found it strange that 7 has a divisibility rule...It's either they don't have a good maths teacher or he/she forgot to check mathematics textbooks.
Well, UK is no longer among the best countries in Mathematics education.
Kudos to the young boy, anyways... Nigerians will make anybody proud anywhere mhen! I found this question on rules of divisibility particularly helpful and self explanatory: http://9jababa.com/junior-mathematics-where-are-the-maths-gurus/ |
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