The average of three numbers is 40. The first number is twice the second and the second one is thrice the third number. The difference between the largest and the smallest numbers is

A man is twice as fast as women and woman is twice fast as a boy. If all of them i.e., a man, a woman and a boy can finish a work together in 4 days, in how many days will a boy do it alone?

A dealer buys an article marked at ₹ 25,000 with 20 % and 5% off. He spends 1,000 for its repair and sells it for ₹ 25,000 what is his gain or loss percent? 

A circular wire of radius 49 cm is bent in the form of a rectangle whose sides are in the ratio of 6:5 the smaller side of the rectangle is 

In ΔABC, AB = AC and ∠B = 40 °, find the value of ∠A.

If $$ secθ-tanθ={1\over\sqrt{3}}$$, the value of secθ.tanθ=?

The speed of a boat in still water 11 km/hr. It can go 12 km upstream and return downstream to the engine point in 2hr 45min. What is the speed of stream?

Two - third of a consignment was sold at a profit of 5% and the remaining at a loss of 2 %. If the total profit was Rs. 400. then the value of the consignment was