Coding problems

PythonFrom CS Unplugged Beginner robot

Binary card values

lists, loops, doubling

ages 8-10Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Binary card values

lists, loops, doubling

ages 8-10Beginner robot

PythonFrom CS Unplugged Beginner robot

Cards from the biggest down

lists, while loops, halving

ages 8-10Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Cards from the biggest down

lists, while loops, halving

ages 8-10Beginner robot

PythonFrom CS Unplugged Beginner robot

Does it divide?

remainder (%), true and false

ages 8-10Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Does it divide?

remainder (%), true and false

ages 8-10Beginner robot

Python Beginner robot

Double it

functions, return, multiplying

ages 8-10Beginner robot

Python Beginner robot

Greet someone

functions, return, joining text

ages 8-10Beginner robot

JavaScript Beginner robot

Greet someone

functions, return, joining text

ages 8-10Beginner robot

Python Beginner robot

Say hello

print, text in quote marks

ages 8-10Beginner robot

JavaScript Beginner robot

Say hello

console.log, text in quote marks

ages 8-10Beginner robot

PythonFrom CS Unplugged Beginner robot

Add hours on a 24-hour clock

remainder (%), clock arithmetic

ages 11-13Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Add hours on a 24-hour clock

remainder (%), clock arithmetic

ages 11-13Beginner robot

PythonFrom CS Unplugged Beginner robot

Add in parts

remainder (%), if / else, building text

ages 11-13Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Add in parts

remainder (%), if / else, building text

ages 11-13Beginner robot

JavaScript Beginner robot

Add two numbers

functions, return, adding

ages 11-13Beginner robot

JavaScript Beginner robot

Add up a list

arrays, loops, variables

ages 11-13Beginner robot

PythonFrom CS Unplugged Beginner robot

All the factors

loops, remainder (%), lists

ages 11-13Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

All the factors

loops, remainder (%), lists

ages 11-13Beginner robot

Python Beginner robot

Count the even numbers

lists, loops, if, remainder (%)

ages 11-13Beginner robot

JavaScript Beginner robot

Find the biggest number

arrays, loops, if, comparing numbers

ages 11-13Beginner robot

PythonFrom CS Unplugged Beginner robot

How many cards do I need?

while loops, doubling, counting

ages 11-13Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

How many cards do I need?

while loops, doubling, counting

ages 11-13Beginner robot

PythonFrom CS Unplugged Beginner robot

Inside angle of a shape

maths in code, functions, division

ages 11-13Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Inside angle of a shape

maths in code, functions, division

ages 11-13Beginner robot

Python Beginner robot

Is it even?

True and False, remainder (%), comparing with ==

ages 11-13Beginner robot

PythonFrom CS Unplugged Beginner robot

Power of a number

loops, multiplying, exponents

ages 11-13Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Power of a number

loops, multiplying, exponents

ages 11-13Beginner robot

PythonFrom CS Unplugged Beginner robot

Spot a parity error in a row

counting, remainder (%), true and false

ages 11-13Beginner robot

JavaScriptFrom CS Unplugged Beginner robot

Spot a parity error in a row

counting, remainder (%), true and false

ages 11-13Beginner robot

Python Intermediate alien

Add a parity bit

error detection, counting, remainder (%), joining text

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Add hours on a 12-hour clock

remainder (%), clock arithmetic, special cases

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Add hours on a 12-hour clock

remainder (%), clock arithmetic, special cases

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Barcode: the last digit

check digits, loops, remainder (%)

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Barcode: the last digit

check digits, loops, remainder (%)

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Count the dots on the cards

binary to decimal, loops, doubling

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Count the dots on the cards

binary to decimal, loops, doubling

ages 11-13Intermediate alien

JavaScript Intermediate alien

Count the vowels

strings, loops, includes, lower case

ages 11-13Intermediate alien

Python Intermediate alien

Count the words

dictionaries, loops, split, lower case

ages 11-13Intermediate alien

JavaScript Intermediate alien

Factorial

loops, multiplying, building up a result

ages 11-13Intermediate alien

Python Intermediate alien

Fizz and Buzz

loops, range, if / elif, remainder (%), lists

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Is it a prime?

loops, remainder (%), early return

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Is it a prime?

loops, remainder (%), early return

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Leap years

remainder (%), if / elif / else, rules with exceptions

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Leap years

remainder (%), if / elif / else, rules with exceptions

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Months later

lists, indexes, remainder (%)

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Months later

lists, indexes, remainder (%)

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Name the music note

lists, remainder (%), music and maths

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Name the music note

lists, remainder (%), music and maths

ages 11-13Intermediate alien

Python Intermediate alien

Palindromes

strings, lower case, replace, reversing with [::-1]

ages 11-13Intermediate alien

Python Intermediate alien

Reverse the words

strings, split and join, slicing

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Show a number with five cards

binary numbers, loops, if / else, building text

ages 11-13Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Show a number with five cards

binary numbers, loops, if / else, building text

ages 11-13Intermediate alien

JavaScript Intermediate alien

Turn text around

strings, loops, building a result

ages 11-13Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Book code: the last digit

check digits, loops, remainder (%), text and numbers

ages teen+Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Book code: the last digit

check digits, loops, remainder (%), text and numbers

ages teen+Intermediate alien

PythonFrom CS Unplugged Intermediate alien

Prime factors

helper functions, primes, loops, lists

ages teen+Intermediate alien

JavaScriptFrom CS Unplugged Intermediate alien

Prime factors

helper functions, primes, loops, lists

ages teen+Intermediate alien

JavaScript Intermediate alien

Sort a list by hand

arrays, nested loops, swapping, sorting

ages teen+Intermediate alien

PythonFrom CS Unplugged Advanced astronaut

Add two video lengths

splitting text, remainder (%), whole-number division, units of time

ages teen+Advanced astronaut

JavaScriptFrom CS Unplugged Advanced astronaut

Add two video lengths

splitting text, remainder (%), whole-number division, units of time

ages teen+Advanced astronaut

JavaScript Advanced astronaut

Binary search

binary search, divide and conquer, while loops, indexes

ages teen+Advanced astronaut

PythonFrom CS Unplugged Advanced astronaut

Card number: the last digit

check digits, Luhn method, loops from the right, remainder (%)

ages teen+Advanced astronaut

JavaScriptFrom CS Unplugged Advanced astronaut

Card number: the last digit

check digits, Luhn method, loops from the right, remainder (%)

ages teen+Advanced astronaut

PythonFrom CS Unplugged Advanced astronaut

Check any barcode

check digits, loops from the right, validation

ages teen+Advanced astronaut

JavaScriptFrom CS Unplugged Advanced astronaut

Check any barcode

check digits, loops from the right, validation

ages teen+Advanced astronaut

JavaScript Advanced astronaut

Fibonacci, fast

loops, keeping state in variables, why repeating work is slow

ages teen+Advanced astronaut

PythonFrom CS Unplugged Advanced astronaut

Find the flipped card

lists of text, nested loops, parity, error correction

ages teen+Advanced astronaut

JavaScriptFrom CS Unplugged Advanced astronaut

Find the flipped card

lists of text, nested loops, parity, error correction

ages teen+Advanced astronaut

Python Advanced astronaut

Find the prime numbers

loops inside loops, divisors, break, efficiency

ages teen+Advanced astronaut

Python Advanced astronaut

Flatten a list

lists inside lists, isinstance, recursion (a function calling itself)

ages teen+Advanced astronaut

PythonFrom CS Unplugged Advanced astronaut

Is this book code real?

check digits, validation, loops, remainder (%)

ages teen+Advanced astronaut

JavaScriptFrom CS Unplugged Advanced astronaut

Is this book code real?

check digits, validation, loops, remainder (%)

ages teen+Advanced astronaut

PythonFrom CS Unplugged Advanced astronaut

Is this card number possible?

check digits, Luhn method, validation

ages teen+Advanced astronaut

JavaScriptFrom CS Unplugged Advanced astronaut

Is this card number possible?

check digits, Luhn method, validation

ages teen+Advanced astronaut

Python Advanced astronaut

Write a number in binary

binary numbers, while loops, remainder (%) and whole-number division (//), building text

ages teen+Advanced astronaut