Tag: math & puzzles

a shopkeeper buys a dozen article and sell it for 80% profit but he gives 3 articles for free for every dozen item he sells whats his profit %?

if i travel half my distance at 40kmph and the other half at 60 kmph whats my average speed for the whole journey

in a series 1 is repeated once 2 is repeated twice 3 is repeated thrice and so on what would be the digit when sum of all digit reaches 300?

a series of 11 nos has a mean 48 and a median 50 what would be the maximum range between any 2 given nos?

The age of the father 3 years ago was 7 times the age of his son. At present the father's age is 5 times that of his son. What are the present ages of the father and the son?

The avg. age of 30 boys of a class is 14 years. When the age of the class teacher is included, the average becomes 15 years. Find the age of class teacher?

A cricketer has completed 10 innings and his average is 21.5 runs. How many runs he must make in his next inning so as to raise his avg. to 24?

The avg. of 11 results is 30, that of the first five is 25 and that of the last five is 28. Find the value of sixth number?