Question

Users of automatic teller machines are required to enter a four digit pin number. Find how many pin numbers:

(a) start and end with the same digit

Answer 1

9*9*9*1

Answer 2

agree with hahd

Answer 3

thnkx imran

Answer 4

its cause there's 9 possibilities for first digit , 2nd and 3rd dont matter hence they also have 9 possibilities and last one is restricted to one as it must be the digit that was the same as the first

Answer 5

oh i get it but i think zero is included so the answer is 10^3 thanks heaps:)