The average of the marks obtained in an examination by 8 students was 51 and by 9 other students was 68. The average marks of all 17 students was: 

Find compound interest on Rs. 50000 at 12 % per annum for 6 months, compounded quarterly. 

In the adjoining figure ∠AOC=140° where O is the centre of the circle then ∠ ABC is equal to:

Aryan invested ₹ 5200 at 4 %, 6 % and 8 % per annum simple interest. At the end of the year, he got the same interest in all the three cases, find the money invested at 4%. 

Select the correct set of symbols which will fit in the given equation 5 0 3 5 = 20 

(53×87+159×21+106×25) is equal to 

If the profit on selling an article for Rs. 579 is the same as the loss on selling it for Rs. 337, then find the profit percent if its selling price is Rs. 687.

If 1³ + 2³ + .....+103 = 3025 then 4 + 32 + 108 + ..... 4000 is equal to -