Question

Which of the following numbers is greatest of all?
$2^3\times {10}^7,3^2\times {10}^7$ and $4^2\times {10}^7$

• A. $2^3\times {10}^7$
• B. $3^2\times {10}^7$
• C. $4^2\times {10}^7$
• D. Can't say anything

Answer 1

The correct option is C $4^2\times {10}^7$

Given numbers are $2^3\times {10}^7,3^2\times {10}^7$ and $4^2\times {10}^7$
$2^3\times {10}^7=2\times 2\times 2\times 10000000=80000000$
$3^2\times {10}^7=3\times 3\times 10000000=90000000$
$4^2\times {10}^7=4\times 4\times 10000000=160000000$
Hence, $4^2\times {10}^7$ is greatest number
$\therefore$ C will be correct answer.