If log_x4+log_x16log_x64=12 then find out the value of x.

A man spends 80% of his income. His income is increased by 20% and he increase his expenditure by 10%. His saving are increased by:

The average marks obtained by Saloni in four papers is 51, and in the fifth paper she gets 56 marks. Find her new average in all five papers.

Direction: what should come in place at question mark(?).

$$ {1\over 8}×(223+?)=71$$

In a mixture of milk and water milk is found to be 28%. When 16 litre water is added in the mixture new percentage of milk in mixture becomes 20%. Find the initial quantity of mixture.

The cost price of an article is ₹390. If it is to be sold at a profit of 3.12 %, how much would be its approximate selling price?

Study the following information carefully to answer the questions.
The teachers' colony has 2800 members, out of which 650 members read only English newspaper. 550 members read only Hindi newspaper and 450 members read only Marathi newspaper. The number of members reading all the 3 newspapers is 100. Members reading Hindi as well as English newspapers are 200. 400 members read Hindi as well as Marathi newspaper and 300 members read English as well as Marathi newspaper.

Find the difference between number of members reading English as well as Marathi newspaper and the number of members reading English as well as Hindi newspaper.

Shyam can complete a task in 12 days by working 10 hours a day. How many hours a day should he work to complete the task in 8 days?