Question

How many numbers are there between 100 and 300 which either begin with or end with 2?

(a) 110

(b) 111

(c) 112

(d) of the above

Answer 1

(a) From 100 to 199, there are 10 numbers ending
with 2. They are 102, 112, 122, 132, 142, 152, 162, 172, 182, 192.
And from 200 to 300, there are 100 numbers
beginning with 2. They are 200, 201, 202...,299.
There are 110 numbers between 100 and 300 which either begain with or end with 2.