Question

Number of integers whose characteristic of logarithm to the base 10 is 3 , is

• A. 8999
• B. 9000
• C. 90000
• D. 99000

Answer 1

Answer: (B)

9000

Let the number having characteristics as $3$ be $x$

$3\le {\log }_{10}\left(x\right)<4$

$1000\le x<10000$

Integer between $1000$ and $10000$

$=10000-1000$

$=9000$