CSAT 2021 Practice Questions

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42. In a huge pile of Apple and oranges, both riped and unriped are mixed together. 15% are unriped fruits. Of the unriped, 45% are apples. Of the riped ones, 66% are oranges. If the pile contains total of 5692000 fruits, how much of them are apples?

43. A water pipe is cut into 2 pieces. The longer pipe is 70% of length of pipe. By how much % is the longer pipe longer than shorter piece?

44. Income of A is 20% higher than that of B. Income of B is 25% less than that of C. What % less is A's income than that of C?

45. A gardener increased area of his rectangular garden by increasing its length by 40% and decreasing its width by 20%. What is the area of new garden?

Alert, was reading a book and was deeply engrossed, but thought to solve it. Solution can be wrong. 

Please check

increase is 12% my bad!

@Naadan_Parinda In my defense I was testing the image uploading algorithm, to compress images whilst uploading so that page does not slow down and the new smiley from the drop down 

Apply formula for such area change questions:

(X) + (Y) + (X) (Y) / 100

Here X = +40% Y= -20% so change in area would be

(+40) + (-20) + (+40) (-20) /100 = 40-20-8 = +12% (Area will be INCREASED by 12% !) 

😊

Change all such %age questions in p/q format , then workout with LCM method reverse engineering.

20% =1/5 , 25% = 1/4 

5 and 4 ka LCM = 20 Assume this as C income

So C=20 units then B= 20×3/4=15 units 

B=15 units then A= 15×6/5= 18 units

So A/C %age = (20-18)/20 ×100 = 10% !

46. C.I. on sum for 2 years is ₹832 and S.I. on same sum at same rate for same period is ₹800. What is the rate of interest?

47. If the interest is compounded quarterly at 10% per annum. What will be the total amount at the end of 2 years if principal is ₹10,000.

1. Practice makes u more perfect.

2. CSAT m time issues bhut kam hotey h if you know the basic techniques of attempting questions. 

3. These are SSC shortcuts - converting in p/q form and LCM method makes calculation very easy and less error prone. 8×4=32 type calculations will cause less errors vis a vis 0.8×0.4 kind calculations under tensed environments.

4. But yes you need to practice well to get more perfection in these ! 

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