Something that can be used for all four mathematical operations
Four basic mathematical operations
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Addition,
Subtraction,
Multiplication and
Division can be applied.
Like: height, weight, and time are quantities.
Four basic mathematical operations
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Constant Quantity
A quantity which remains same (unchanged) throughout a particular investigation is known as a constant quantity.Fixed Constant:
constants which always remain same (unchanged) independent of the purpose of user, place and time are known as fixed constants.
Example: quotient of circumference of a circle and its diameter which is always equal to π .Arbitrary Constants:
constants which remain same in one problem but may vary from problem to problem and are generally denoted by a, b, c, l, m, n, α, β, γ , etc. -
Variable
A quantity which may change its value even in a particular problem is known as variable.Continuous:
If the nature of the quantity is such that it can take any possible value between two certain limits then such a quantity is known as continuous in nature. Like: HeightDiscrete:
If the nature of the quantity is such that it can take at most countable values between two certain limits then such a quantity is known as discrete in nature