What is the smallest digit that must be added to the product 5786 × 5784 to make it a perfect square?

The LCM of two numbers is 48. If those numbers are in the ratio 2 : 3 then what will be their sum?

The average age of three boys is 15 years if their ages are in the ratio 3 : 5 : 7, what will be the age of the youngest boy?

There are some boys and girls in a room. The square of the number of girls is 28 less than the square of the number of boys. If two more girls join then the number of boys and girls becomes equal, then what is the total number of boys and girls in the room?

In a year, the average expenditure of a family for the first 3 months, next 4 months and last 5 months is Rs 8400 per month, Rs 10080 per month, Rs 10608. Monthly and annual savings are Rs. 8640. If so, what is the average monthly income of this family?

There are two candidates in an election, a candidate gets 71% of the votes and he wins the election by 756 votes, what is the total number of votes?

Total cost of A pens and (A-2) pencils is Rs 424. If one pencil and one pen costs Rs 4 and Rs 20 respectively then find A?

Rajesh purchased two different kinds of alcohol. In the first mixture, the ratio of alcohol to water is 4 : 5 and in second mixture it is 6 : 7. If he mixes the two given mixtures and makes a third mixture of 22 litres in which the ratio of alcohol to water is 5 : 6, the quantity of first mixture that is required to make 22 litres of the third kind of mixture is.