Math MCQ Part-1

A merchant purchases a wrist watch for Rs. 450 and fixes its list price in such a way that after allowing a discount of 10%, he earns a profit of 20%. Find the list price of the watch.

If 16 men working 12 hours a day can complete a work in 27 days, then working for how many hours a day can 18 men complete the work in 24 days ?

A train covers a distance of 10 km in 12 minutes . If its speed is decreased by 5 km/hr. the time taken by it to cover the same distance will be:

A man sold an article at a gain of 5%. Had he sold it for Rs. 240 more, he would have gained  8% . The cost price of the article is

The milk and water in two vessels A and B are in the ratio 4 :3 and 2: 3 respectively. In what ratio, the liquids in both the vessels be mixed to obtain a new mixture in vessel C containing half milk and half water ?

The average of 10 numbers is 14 . If each number is multiplied by 6, what will be the new average ?

The sum of two positive integers is 80 and the difference between them is 20. What is the difference between squares of those numbers ?

Due to 25% fall in the rate of eggs, one can buy 2 dozen eggs more than before by investing Rs. 162. Then the original rate per dozen of the eggs is:

Two numbers are in the ratio 7:11. If their HCF is 28, then the difference between the two number is: