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 18245 times.	Basics Training	Start
New	Multiples of 3 and 5 Solved 16668 times.	Basics Training	Start
New	Print every two letters pairs Solved 13594 times.	Basics Training	Start
New	Print every pair of distinct letters Solved 12726 times.	Basics Training	Start
New	Distance Solved 9739 times.	Training	Start
New	Is divisible by ? Solved 4690 times.	Training	Start
New	Check if a number is prime Solved 7097 times.	Training	Start
New	Print every prime numbers in a range Solved 4995 times.	Training	Start
New	Sum of every prime number below n Solved 5081 times.	Training	Start
New	Next prime Solved 3799 times.	Training	Start
New	Display the date and time Solved 5221 times.	Training	Start
New	The Fibonacci sequence Solved 2539 times.	Training	Start
New	Exceptions Solved 2114 times.	Training Command line	Start
New	Flatten lists Solved 1610 times.	Training	Start
New	Print the content of a file Solved 1851 times.	Training	Start
New	Adam Number Solved 960 times.	Training	Start
New	Product of iterable Solved 1927 times.	Training	Start
New	Frequency of letters in a file Solved 1154 times.	Training	Start
New	Pernicious numbers Solved 1117 times.	Training	Start
New	Count the lower 'e' in the 'words' file Solved 1505 times.	Training	Start
New	Largest product in a series Solved 1007 times.	Training	Start
New	Doing HTTP requests Solved 982 times.	Training	Start
New	Consecutive Sum Solved 574 times.	Training	Start
New	Longest Collatz sequence Solved 1033 times.	Training	Start
New	Simple adder Solved 1845 times.	Training Command line	Start
New	Lambda expressions Solved 823 times.	Training	Start
New	Largest product in a grid Solved 591 times.	Training	Start
New	Pascal's triangle Solved 443 times.	Training	Start
New	CSV and Python Solved 357 times.	Training	Start