Question

How many numbers lying between $500$ and $600$ can be formed with the help of the digits $1,2,3,4,5,6$, when the digits are not to be repeated?

• A. $20$
• B. $40$
• C. $60$
• D. $80$

Answer 1

The correct option is A $20$

$1,2,3,4,5,6$

Number should lie between $500$ and $600$

$\frac{5!}{3!}=5\times 4=20$

$\therefore 20$ numbers