Quantitative Aptitude - Arithmetic Ability Questions

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

A mobile plan costs Rs. 32 for 6 minutes. What is the approximate cost, in rupees, for 4 minutes?

What is the value of Tan 45° + 4/√3 Sec 60°?

A dealer is selling an article at a discount of 5% on the Marked price. If the Marked price is 12% above the cost price and the article was sold for Rs. 532 then the cost price is (in Rs.)

If a2b+c=b2c+a=c2a+b=1 then the value of 21+a+21+b+21+c

Δ DEF is right angled at E. If m∠D = 45°, then what is the value of cosecF X cotD?

Δ LMN is right angled at M. If m∠N = 60 deg., then Tan L =______.

Aditya got 78% marks in the examination. If he secured 663 marks, find the maximum marks.