The average of four consecutive odd numbers is 36. What is the smallest of these numbers?

A borrowed Rs.1500 at 4% per annum and Rs.1400 at 5% per annum for the same period. He paid Rs.390 as total interest. Find the time for which he borrowed the sum.

A sum of Rs. 110 is in the form of Rs. 2, Rs. 1 and 50 paise coins in the ratio of 1 : 2 : 3, respectively. How many 50 paise coins are there?

A glass jar contains 6 white, 8 black, 4 red and 3 blue marbles. If a single marble is chosen at random from the jar, what is the probability that it is black or blue?

The average of a,b,c is 20 and that of b,c,d is 25, if d=30, then the value of a is-

After an increase in tea price by 40% a family reduce its consumption of tea to the extent that there should be an increase on tea expense only by 10%. If the earlier consumption of tea was 28 kg, then what will be their new consumption?

If the height of a perpendicular cylinder is 10 cm and its curved surface area is 440 square cm, what is its radius?

If a side of a square is a, then what will be the area of the square on its diagonal?