# Newbie - Trying to Help a Friend

Tue Nov 19 19:40:18 CET 2013

```Hi,

A Friend is doing maths in University and has had some coursework to do with python.

The question is

"Write a program that calculates how many positive integers less than N are not divisible by 2,3 or 5. The user should be prompted to supply the Number N. Demonstrate your program output when the input N is your student id. (13006517)

"The collatz process is as follows. Take a positive integer n greater than 1. while n is greater than 1 repeat the following; if N is even halve it and if N is odd multiply it by 3 and add 1. The (Unsolved) collatz conjecture is that this process always terminates.

The user should be prompted to supply the number n, and your program should build the list of values taken by sucessive iteration of the algorithm, and print it out. For example, if 7 is input your program should print the list

[7,22,11,34,17,52,26,13,40,20,10,5,16,8,4,2,1]

Demonstrate your program output for an input value consisting of the number formed adding 10 to the last digit of your student id. (13006517)"

Any help would be appreciated

```