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 16756 times.	Basics Training	Start
New	Multiples of 3 and 5 Solved 15276 times.	Basics Training	Start
New	Print every two letters pairs Solved 12420 times.	Basics Training	Start
New	Print every pair of distinct letters Solved 11614 times.	Basics Training	Start
New	Distance Solved 8835 times.	Training	Start
New	Is divisible by ? Solved 3858 times.	Training	Start
New	Check if a number is prime Solved 6382 times.	Training	Start
New	Print every prime numbers in a range Solved 4492 times.	Training	Start
New	Sum of every prime number below n Solved 4606 times.	Training	Start
New	Next prime Solved 3415 times.	Training	Start
New	Display the date and time Solved 4845 times.	Training	Start
New	The Fibonacci sequence Solved 2325 times.	Training	Start
New	Exceptions Solved 1976 times.	Training Command line	Start
New	Flatten lists Solved 1489 times.	Training	Start
New	Print the content of a file Solved 1738 times.	Training	Start
New	Adam Number Solved 830 times.	Training	Start
New	Product of iterable Solved 1793 times.	Training	Start
New	Frequency of letters in a file Solved 1076 times.	Training	Start
New	Pernicious numbers Solved 1039 times.	Training	Start
New	Count the lower 'e' in the 'words' file Solved 1425 times.	Training	Start
New	Largest product in a series Solved 937 times.	Training	Start
New	Doing HTTP requests Solved 923 times.	Training	Start
New	Consecutive Sum Solved 492 times.	Training	Start
New	Longest Collatz sequence Solved 961 times.	Training	Start
New	Simple adder Solved 1792 times.	Training Command line	Start
New	Lambda expressions Solved 781 times.	Training	Start
New	Largest product in a grid Solved 563 times.	Training	Start
New	Pascal's triangle Solved 412 times.	Training	Start
New	CSV and Python Solved 332 times.	Training	Start