# Basic math glossary-I

Basic math glossary-I define words beginning with the letter I

Improper fraction: A fraction with a bigger numerator than a denominator.

Infinite: With no end or limit.

Integers: The set of all whole numbers and their opposites.

Intersecting lines: Lines that meet or cross in the same plane.

Invert: In a fraction, it means to switch the position of the numerator with the denominator .

For example, inverting 2/5 gives 5/2

Irrational number: A number that cannot be expressed as a fraction.

For example, square-root(2) and square-root(3) are irrational number because they cannot b written as a fraction.

Isosceles triangles: A triangle that has two equal sides.
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1. ### Average age word problem

Aug 09, 16 01:40 PM

Average age of Dipu and Apu is 22 years. Average age of Dipu and Tipu is 24 years. Age of Dipu is 21 years. What are the ages of Apu, and tipu ? Let