In how many 6 digit numbers can be formed using the digits 1 to 5(repetitions allowed) such that the number reads the same from left to right or from right to left(e.g. 134431)?
a)5^6 b)5^3 c)5^2 d)5^10
Students attend our lectures, not because the mathematics we teach ‘makes lots of fun’ for us, but because they believe they can learn some essential knowledge from us. And each of our young students has only one life to live. We should therefore be a