Question

Find x:
$(52{)}_7+(46{)}_8=(x{)}_{10}$

• A. $(75{)}_{10}$
• B. $(50{)}_{10}$
• C. $(39{)}_{39}$
• D. $(28{)}_{10}$

Answer 1

The correct option is A $(75{)}_{10}$

$(52{)}_7=(5\times 7^1+2\times 7^0{)}_{10}=(37{)}_{10}also,(46{)}_8=(4\times 8^1+6\times 8^0{)}_{10}=(38{)}_{10}sum=(75{)}_{10}$