Seating arrangement questions can be solved by making use of diagrams. Different cases need to be considered and based on given conditions certain cases can be ruled out. We have a detailed video on the topic explaining each and everything so I would suggest you to subscribe to our video series.
In case you have doubt in any particular question, I would request you to post the question here.

Let one of the angles of the rhombus be x then other will be x+60. Now it is given that 2x+2x+120 = 360
So 4x =240 => x =60. So angles of the rhombus are 120, 60, 120, 60. Diagonals of rhombus intersect at 90 degrees.
so a 30 60 90 right angled triangle is formed. One of the diagonals is of length x and other is rt 3 x so required ratio is rt 3
Hope that helps

Hi Krittika,
It is a philosophical passage where the author is trying to put forth a view by using the story of TOM.
Tom was supposed to whitewash a wall but he manipulated other boys such that other boys were eager to whitewash the wall.
How tom benefitted from this and what conclusions he drew about the difference between work and play are mentioned in the passage.
This is the basic outline of the passage.
I hope your doubts were resolved. If you have doubt in any particular question, you can post it again.
Thanks.

Hi Krittika
The question is based on the concept of distinct number of meeting points in circular motion
If you don't know the concept, then it is as follows
When people are moving on circular tracks in opposite directions and the ratio of their speeds is m:n (m and n are co-prime to each other) then number of unique meeting points is m+n.
If they are moving in same direction, then it is m-n
Hope that helps.
Thanks.

The radius of the circle is known, so drop a perpendicular from the center on the side of the triangle. It will bisect the side.(property of circle). So we will get a 60-30-90 right angled triangle. Now applying Pythagoras theorem we can find that side of triangle = 2rt3. Now since AD is diameter, angle ACD and angle BCD both should be 90 degrees. (angles in a semicircle)
So we can find the area of triangle ACD and ABD. Sumof these two areas will give us the area of quadrilateral.
Hope your doubt is cleared. If some doubt remains, please post it again.
Thanks

c-6

(C) 6

First of all if you pretty sure that a set is time-consuming and calculation intensive, it is always better not to start with that set. The reason being that if you solve that set 15-18 minutes then it will press the panic button. So look out for other sets which you can solve. Once you are done with all other solvable sets, then you can come back to this set. Now have a look at questions where options are not ver close. In these questions you can use approximations. For the questions with close option choices there is no choice but to calculate.
Thanks.

Hi Yasmin,
We have a blog post on how to solve para jumbles. You can go through it, I am sure it will be useful to you. Here's the link https://cracku.in/blog/solve-parajumbles-cat/
Thanks.

90^468 can be written as (9X10)468
Now the number will have 468 zeroes in the left because of 10^468.
So basically the question is to find the unit digit of 9^468 or 3^936.
powers of 3 has cyclicity.
3,9,7,1,3,9,7,1,3,9,7,1....
After every 4 terms, the series repeat.
936 is divisible by 4. This means that the last term will correspond to 4th term in the cycle, i.e. 1
So the answer is 1.

The zeros in this number will come only from 10 in the 20. Break the number in the following way-
(2X10)2520
All the zeroes will come from 10^2520
So the unit digit if 2^2520 is the rightmost non zero valu.
Now powers of 2 has cyclicity.
2,4,8,6,2,4,8,6...
You will notice that after every 4 terms, the series repeat. 2520 is divisble by 4. This means the last digit should be the forth term i.e 6.
So, 6 is the answer

2^2520mod10=2^4mod10=6