WBCS 2021 Mains (General Studies Paper-IV) Prev. Yr. Paper (24-May-2022)

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:

Find the largest possible 4-digit number divisible by 45, 18 and 35.

If a car is sold for $\text{Rs. }50,000$ the profit is $17\%$, what would be the profit percentage if sold for $\text{Rs. }47,000$?

If $\tan \theta +\sec \theta =4$, then what is the value of $\cos \theta$?

In a certain code 'a friend of mine' is written as '4916', 'mine lot of metal' is written as '3109' and 'a piece of metal' is coded as '7163'. How can '673' be written in the same coding system?