Quantitative Aptitude - Arithmetic Ability Questions

Find the LCM of 0.63, 10.5, 2.1, 4.20

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

What is the third proportional to 9 and 45?

From a container of milk, 5 litres of milk is replaced with 5 litres of water. This process is repeated again. Thus in two attempts the ratio of milk and water became 81 : 19. The initial amount of milk in the container was

The difference between the selling prices of an article sold at 4% and 3% profits is Rs.3 The cost price of the article is :

Selling price of an article is Rs 1144. If loss percentage is 12%, then what is the cost price (in Rs) of article?

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 4 days. How long B alone would take to do the whole work?

There are 90 coins, comprising of 5 and 10 paisa coins. The value of all the coins is Rs. 7. How many 5 paisa coins are there?