If a regular polygon has 16 sides, then what is the measure (in degrees) of its each interior angle?

If $$ {a={1+x\over 2-x}}$$, then find the value $$ {1\over {a+1}}+{2a+1\over{a^{2}-1}}$$ ?

If three persons A, B and C invested in a business in the ratio 10 : 15 : 8 for 8 months, 6 months and 12 months respectively. If the total profit earned at the end of the year is Rs.2660 find the Share of B (in Rs.) in the total profit-

The sum of four numbers is 64. If you add 3 to the first number, 3 is subtracted from second number, the third is multiplied by 3 and the sum is divided by 3, then all the results are equal. What is the difference between the largest and the smallest of the original numbers?

The areas of three adjacent faces of a cuboidal tank are 3 m², 12 m² and 16 m². The capacity of the tank, in litres, is:

The average weight of 40 children of a class is 36.2 kg. When three more children with weight 42.3 kg, 39.7 kg and 39.5 kg join the class, the average weight of the 43 children in the class is: 

In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 2 : 3 : 5 respectively. If the value of all the coins is ₹5.25. then how many 5 p coins are there in the bag?

Ravi drove for 4 hours at a speed of 70 miles per hour and for 2 hours at 40 miles per hour. What was his average speed (in miles per hour) for the whole journey?