Question

Find value of x:
$(24{)}_2\times (32{)}_5=(x{)}_5$

• A. 1423
• B. 1422
• C. 1420
• D. 1323

Answer 1

The correct option is A 1423

$(24{)}_5=(14{)}_{10}and(32{)}_5=(17{)}_{10}$. Hence, the required answer can be got by $14\times 17=(238{)}_{10}=1\times 5^3+4\times 5^2+2\times 5^1+3\times 5^0\to 1423$ is the correct answer.