Write a python program to count the number of digits in a number?
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Write a python program to check if a number is a perfect number?
Write a function that takes as input a binary tree, and prints out each level of the tree on a newline. For example: a / b c / / d e f will output: a b c d e f
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Write a program to find sum of the digits of a number in python?
Write a python program to count the number of vowels in a string?
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The sum of three numbers is 20. The second number is 4 times the first number , and the sum of the first and third is8. Find the numbers.
Write a function that takes an array of integers and efficiently calculates and returns the Least Common Multiply in python.
How to print sum of the numbers starting from 1 to 100?
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