A boat covers 18 km downstream in 3 hours. If the speed of the current is 1/3 of its downstream speed. In what time will it cover a distance of 100 km upstream?

Chapters. Number System

S1 is a series of 4 consecutive even numbers. If the sum of reciprocal of first two numbers of S1 is 11/60, then what is the reciprocal of the third highest number of S1?

Chapters. Number System

The ten’s digit of a three digit number is 3. If the digits of x are interchanged and the number thus formed is 396 more than the previous one. The sum of unit digit and hundred digit is 14, then what is the number?

Chapters. Time and Work

An alone can do a work in 24 days. Time taken by A in completing 1/3 of work is equal to the time taken by B in completing 1/2 of the work. In what time A and B together will complete the work?

Chapters. Problems on trains

Sum of the length of two trains A and B is 660. The ratio of the speeds of A and B is 5 : 8. The ratio between time to cross an electric pole by A and B is 4 : 3. Find the difference in the length of two trains.

Chapters. Problems on Ages

Sum of the present ages of A, B, C, and D is 76 years. After 7 years ratio of their ages is 7 : 6 : 5 : 8. What is C’s present age?

Chapters. Alligation and Mixture

A mixture of milk and water in a jar contains 28 L milk and 8 L water. X L milk and X L water are mixed to form a mixture. If 40% of the new mixture is 20 L, then find the value of X.

Chapters. Profit and Loss

The ratio of cost price to the selling price of an article is 5 : 6. If 20% discount is offered on marked price of the article then marked price is what percent more than cost price?

Chapters. Alphanumeric

How Many such pairs of letters are there in the word ‘TRANSFER’, each of which has as many letters between them in the word as they have between them in the English alphabet?

Chapters. Percentage

Ramesh has 20% savings with him from his monthly salary. If expenditure on clothing is 25% of overall expenditure and his total expenditure except clothing is 3600 then find his saving?

Chapters. Partnership

A, B and C invested in a business in the ratio 6 : 8 : 9. If B invested for a period whose numerical value is 112.5% of B’s investment but A and C invested for one year. If profit of B at the end of the year is 16750 then what is the share of profit of C?