Generalised form of a two-digit number

Question:

Generalised form of a two-digit number xy is

(a)x + y

(b)10x + y

(c)10x-y

(d)10y+x

Solution:

(b) In generalised form, xy can be written as the sum of the products of its digits with their respective place values, i.e.xy = 10x+ y

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