A candidate scoring 25% marks in an examination fails by 30 marks while another candidate who scores 50% marks gets 20 marks more than those required to pass. The pass percentage is

If \(2^x = 3^y = 6^{-z}\), then \(\left(\frac{1}{x} + \frac{1}{y} + \frac{1}{z}\right)\) is equal to

A dishonest dealer professes to sell his goods at cost price. But he uses a false weight and thus gains \(6\frac{18}{47}\%\). For a kg, he uses a weight of

\(\frac{4}{7}\) of a pole is in the mud. When \(\frac{1}{3}\) of it is pulled out, 250 cm of the pole is still in the mud. The full length of the pole is

Harish divides two sums of money among his four sons Naresh, Vipin, Bhupesh, and Yogesh. The first sum is divided in the ratio 4 : 3 : 2 : 1 and second in the ratio 5 : 6 : 7 : 8. If the second sum is twice the first, then the largest total is received by

A number consists of two digits whose sum is 8. If 18 is added to the number, its digits are interchanged. The number is

A is working, and B a sleeping partner in a business. A puts in Rs.12000 and B Rs. 20000. A received 10% of the profit for managing, the rest being divided in proportion to their capitals. Out of a total profit of Rs. 9600, the money received by A will be

In a cricket team of 11 players, the average age is 28 years. Out of these, the average ages of three groups of three players each are 25 years, 28 years and 30 years respectively. If in these groups, the captain and the youngest player are not included and the captain is eleven…

A contractor undertakes to do a piece of work in 40 days. He engages 100 men at the beginning and 100 more after 35 days and completes the work in stipulated time. If he had not engaged the additional men, how many days behind schedule would it be finished?