Question 11

In algebra, letters may stand for

(a) known quantities

(b) unknown quantities

(c) fixed numbers

(d) None of these

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Solution

Option (b).

In algebra, letters may stand for unknown quantities. A letter that represents an unknown number which can take any value is called as a variable.

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d

Measurement is nothing but the comparison of an unknown quantity with a known fixed quantity of the same type.

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