A scientific calculator has 5 rows and 9 columns.How many bits required for addressing assuming separate row and column addresses?

Name: A scientific calculator has 5 rows and 9 columns.How many bits required for addressing assuming separate row and column addresses?
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The Answer is

5 ext { Rows } ightarrow 3 ext { bits, } 9 ext { columns } ightarrow 4 ext { bits: } 7 ext {-bit address required. }

A Scientific Calculator Has 5 Rows and 9 Columns