Question

How many digit no more than 600 can be from by using digit 2,3,4,6,7

Answer 1

We have,

Any 5 digit number 2,3,4,6,7

Total number is $5!=5\times 4\times 3\times 2\times 1=120$.way

According to given questions

Total 4 digit number $5\times 4\times 3\times 2=120$

Now,

Neglecting the numbers where 5 is at hundred’s place $=6$

Then,

$120-6=114$

Total numbers$=114+120=234$

Hence, this is the answer.