Hello Freinds🙏🏻, I am new student for CAT exam, I don't know anything... plz help me dears.........😊🙏🏻

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Hello Freinds🙏🏻, I am new student for CAT exam, I don't know anything... plz help me dears.........😊🙏🏻

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Ash Kagzi 3 months ago

whats about your maths ??

with shortcuts

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Arjun Rathaur 1 year ago

AB is a perfect cube. AC is a power of 3 and AC = 3*AB

So, AB has to be a power 3 which is a multiple of 3(because it is a cube).

First case is AB = 27, then AC is 81. But looking at the options this is not the case.

AB = 3^6 = 729, AC = 2187. The perimeter will be 729 + 2187 + 397

Perimeter = 3313 feet

Note that this building can be triangular, but can not form a triangle since the sum of two side is less than the third side.

So, AB has to be a power 3 which is a multiple of 3(because it is a cube).

First case is AB = 27, then AC is 81. But looking at the options this is not the case.

AB = 3^6 = 729, AC = 2187. The perimeter will be 729 + 2187 + 397

Perimeter = 3313 feet

Note that this building can be triangular, but can not form a triangle since the sum of two side is less than the third side.

i am not scoring in my mocks,my scores are gradually decreasing plus i am really badd at maths how to improve quants pleaseee suggesstttt :(

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Aakash Jaiswal 1 year ago

Hi Aviral.

Well the good news is that you have discovered it early in your CAT Prep. I think your scores will definitely improve with correct analysis of the Mocks that you take.

Well the good news is that you have discovered it early in your CAT Prep. I think your scores will definitely improve with correct analysis of the Mocks that you take.

solve it

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Harish 1 year ago

Let the no of correct qns be (x), incorrect qns be (y) and skipped qns be (z)...

According to the qn,

x+y+z= 50-----(1)

x - y/3 - z/6= 32

Or

6x - 2y -z. = 192-------(2).

Eliminate z by adding the eqns 1 and 2

7x -y= 242

x= (242+y)/7...

We can see that y cannot take values less than 3..

The answer is option (3).

According to the qn,

x+y+z= 50-----(1)

x - y/3 - z/6= 32

Or

6x - 2y -z. = 192-------(2).

Eliminate z by adding the eqns 1 and 2

7x -y= 242

x= (242+y)/7...

We can see that y cannot take values less than 3..

The answer is option (3).

The number of trailing zereos in (23!+24!+25!) = ?

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6 Comments

Sunayana 1 year ago

You can learn more about this concept here: https://cat.magnusprep.com/article/find-the-number-of-trailing-zeros-quantitative-aptitude-for-cat-2018

what is speed maths?

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Anton Menezes 1 year ago

Hi Surya, Speed Maths refers to any techniques that can help you in performing specific types of calculations faster than the conventional method. Our free course on First Principles can help you get started with that.

how can I preparations exam cat

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Aakash 1 year ago

Tomorrow there is a Free webinar from Magnus Prep on 'CAT 2018- Getting started at the right way' at 7pm. You will find the registration link on the forum itself. Do attend the webinar and you will get answers to all your doubts regarding CAT 2018 Preparation.

At which time number of minutes elapsed since midnight is nine times the number of minutes before noon?

- A 8.30 am
- B 6.56 am
- C 9.46 am
- D 10.48 am

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