Quantitative Aptitude - Arithmetic Ability Questions

Average of 11 numbers is 7. If every number is doubled, then what will be the new average of the numbers?

Three bottles of equal capacity containing mixture of milk and water in ratio 2 : 5, 3 : 4 and 4 : 5 respectively. These three bottles are emptied into a large bottle. What will be the ratio of milk and water respectively in the large bottle?

The price of an article is cut by 3%. To restore to its original value, the new price must be increased by

A parallelogram PQRS, the length of whose sides are 8 cm and 12 cm, has one diagonal 10 cm long Ile length of the other diagonal is approximately:

If 6A = 7B = 5C; find A : B : C

If a watch is being sold at Rs 7,225 which is marked at Rs 8,500, then what is the discount (in %) at which the watch is being sold?

A wholesaler sells a watch to a retailer at a gain of 37% and the retailer sells it to a customer at a loss of 25%. If the customer pays Rs 2,620.125, what had it cost the wholesaler?

P and Q can do a project in 6 and 12 days respectively. In how many days can they complete 25% of the project if they work together?