Training

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Those exercises are often focusing on a single aspect of the language:

They should be quick to understand.
But they may not be the kind of problem you'll encounter in real life.

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New	Sum of even numbers <= 100 Solved 18305 times.	Basics Training	Start
New	Multiples of 3 and 5 Solved 16721 times.	Basics Training	Start
New	Print every two letters pairs Solved 13642 times.	Basics Training	Start
New	Print every pair of distinct letters Solved 12771 times.	Basics Training	Start
New	Distance Solved 9812 times.	Training	Start
New	Is divisible by ? Solved 4732 times.	Training	Start
New	Check if a number is prime Solved 7133 times.	Training	Start
New	Print every prime numbers in a range Solved 5035 times.	Training	Start
New	Sum of every prime number below n Solved 5100 times.	Training	Start
New	Next prime Solved 3815 times.	Training	Start
New	Display the date and time Solved 5240 times.	Training	Start
New	The Fibonacci sequence Solved 2550 times.	Training	Start
New	Exceptions Solved 2120 times.	Training Command line	Start
New	Flatten lists Solved 1614 times.	Training	Start
New	Print the content of a file Solved 1856 times.	Training	Start
New	Adam Number Solved 966 times.	Training	Start
New	Product of iterable Solved 1933 times.	Training	Start
New	Frequency of letters in a file Solved 1158 times.	Training	Start
New	Pernicious numbers Solved 1120 times.	Training	Start
New	Count the lower 'e' in the 'words' file Solved 1508 times.	Training	Start
New	Largest product in a series Solved 1010 times.	Training	Start
New	Doing HTTP requests Solved 984 times.	Training	Start
New	Consecutive Sum Solved 576 times.	Training	Start
New	Longest Collatz sequence Solved 1036 times.	Training	Start
New	Simple adder Solved 1847 times.	Training Command line	Start
New	Lambda expressions Solved 825 times.	Training	Start
New	Largest product in a grid Solved 593 times.	Training	Start
New	Pascal's triangle Solved 443 times.	Training	Start
New	CSV and Python Solved 358 times.	Training	Start