Problems related to numbers

Problems related to income and expenditure

Problems related to ages

Problems related to concentric circles

Problems related to percentages

word problems related to operations of sets

Problems related to finding the no of digits in a given no

Mention two important problems relating to nuclear energy.

Write two problems related to iodine deficiency in India.

What are environmental problems related to atomic reactors?

Vinay want to solve a problem related to mirrors. What are the rules to be followed by him in order to solve the problem ?