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 13108 times.	Basics Training	Start
New	Multiples of 3 and 5 Solved 11865 times.	Basics Training	Start
New	Print every two letters pairs Solved 9456 times.	Basics Training	Start
New	Print every pair of distinct letters Solved 8771 times.	Basics Training	Start
New	Distance Solved 6392 times.	Training	Start
New	Is divisible by ? Solved 1539 times.	Training	Start
New	Check if a number is prime Solved 4461 times.	Training	Start
New	Print every prime numbers in a range Solved 3091 times.	Training	Start
New	Sum of every prime number below n Solved 3364 times.	Training	Start
New	Next prime Solved 2409 times.	Training	Start
New	Display the date and time Solved 3803 times.	Training	Start
New	The Fibonacci sequence Solved 1754 times.	Training	Start
New	Exceptions Solved 1575 times.	Training Command line	Start
New	Flatten lists Solved 1149 times.	Training	Start
New	Print the content of a file Solved 1444 times.	Training	Start
New	Adam Number Solved 477 times.	Training	Start
New	Product of iterable Solved 1443 times.	Training	Start
New	Frequency of letters in a file Solved 876 times.	Training	Start
New	Pernicious numbers Solved 858 times.	Training	Start
New	Count the lower 'e' in the 'words' file Solved 1218 times.	Training	Start
New	Largest product in a series Solved 759 times.	Training	Start
New	Doing HTTP requests Solved 767 times.	Training	Start
New	Longest Collatz sequence Solved 779 times.	Training	Start
New	Simple adder Solved 1643 times.	Training Command line	Start
New	Consecutive Sum Solved 277 times.	Training	Start
New	Lambda expressions Solved 658 times.	Training	Start
New	Largest product in a grid Solved 467 times.	Training	Start
New	Pascal's triangle Solved 353 times.	Training	Start
New	CSV and Python Solved 278 times.	Training	Start