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 18571 times.	Basics Training	Start
New	Multiples of 3 and 5 Solved 16967 times.	Basics Training	Start
New	Print every two letters pairs Solved 13835 times.	Basics Training	Start
New	Print every pair of distinct letters Solved 12951 times.	Basics Training	Start
New	Distance Solved 9951 times.	Training	Start
New	Is divisible by ? Solved 4868 times.	Training	Start
New	Check if a number is prime Solved 7244 times.	Training	Start
New	Print every prime numbers in a range Solved 5129 times.	Training	Start
New	Sum of every prime number below n Solved 5184 times.	Training	Start
New	Next prime Solved 3878 times.	Training	Start
New	Display the date and time Solved 5301 times.	Training	Start
New	The Fibonacci sequence Solved 2584 times.	Training	Start
New	Exceptions Solved 2146 times.	Training Command line	Start
New	Flatten lists Solved 1641 times.	Training	Start
New	Print the content of a file Solved 1877 times.	Training	Start
New	Adam Number Solved 993 times.	Training	Start
New	Product of iterable Solved 1961 times.	Training	Start
New	Frequency of letters in a file Solved 1173 times.	Training	Start
New	Pernicious numbers Solved 1137 times.	Training	Start
New	Count the lower 'e' in the 'words' file Solved 1523 times.	Training	Start
New	Largest product in a series Solved 1025 times.	Training	Start
New	Doing HTTP requests Solved 994 times.	Training	Start
New	Consecutive Sum Solved 592 times.	Training	Start
New	Longest Collatz sequence Solved 1052 times.	Training	Start
New	Simple adder Solved 1857 times.	Training Command line	Start
New	Lambda expressions Solved 832 times.	Training	Start
New	Largest product in a grid Solved 599 times.	Training	Start
New	Pascal's triangle Solved 450 times.	Training	Start
New	CSV and Python Solved 362 times.	Training	Start