A number has three digits. By taking digits as r,s and t ,write the equation for that number. (Take number as 'B' )

B= 10r+100s+t

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B= 100r+10s+t

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B= 100r+10s+t

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B= 100r+10s+10t

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Solution

The correct option is B B= 100r+10s+t
Let the digits in hundreds,tens and unit's place be r,s and t respectively.
Place value of r= 100
So, value of the digit r= 100r

Place value of s= 10
So, value of the digit s= 10s

Place value of t= 1
So, value of the digit t= t

Thus, number= 100r+10s+t

$\Rightarrow$ B= 100r+10s+t

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