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 15394 times.	Basics Training	Start
New	Multiples of 3 and 5 Solved 14015 times.	Basics Training	Start
New	Print every two letters pairs Solved 11317 times.	Basics Training	Start
New	Print every pair of distinct letters Solved 10566 times.	Basics Training	Start
New	Distance Solved 7920 times.	Training	Start
New	Is divisible by ? Solved 3004 times.	Training	Start
New	Check if a number is prime Solved 5652 times.	Training	Start
New	Print every prime numbers in a range Solved 3964 times.	Training	Start
New	Sum of every prime number below n Solved 4139 times.	Training	Start
New	Next prime Solved 3026 times.	Training	Start
New	Display the date and time Solved 4475 times.	Training	Start
New	The Fibonacci sequence Solved 2115 times.	Training	Start
New	Exceptions Solved 1819 times.	Training Command line	Start
New	Flatten lists Solved 1367 times.	Training	Start
New	Print the content of a file Solved 1636 times.	Training	Start
New	Adam Number Solved 704 times.	Training	Start
New	Product of iterable Solved 1675 times.	Training	Start
New	Frequency of letters in a file Solved 1014 times.	Training	Start
New	Pernicious numbers Solved 982 times.	Training	Start
New	Count the lower 'e' in the 'words' file Solved 1353 times.	Training	Start
New	Largest product in a series Solved 884 times.	Training	Start
New	Doing HTTP requests Solved 866 times.	Training	Start
New	Consecutive Sum Solved 421 times.	Training	Start
New	Longest Collatz sequence Solved 908 times.	Training	Start
New	Simple adder Solved 1739 times.	Training Command line	Start
New	Lambda expressions Solved 739 times.	Training	Start
New	Largest product in a grid Solved 528 times.	Training	Start
New	Pascal's triangle Solved 388 times.	Training	Start
New	CSV and Python Solved 311 times.	Training	Start