https://www.splashlearn.com/s/math-worksheets/addition-facts-within-20-missing-numbers
If an addend is missing, students use the count-on method or the relationship between addition and subtraction to determine the missing number. Also, they add...
missing numbersmath worksheetsadditionfactswithin
https://www.hackerrank.com/challenges/missing-numbers/leaderboard?page=1
Find the numbers missing from a sequence given a permutation of the original sequence
missing numbersleaderboardhackerrank
https://www.hackerrank.com/challenges/missing-numbers/leaderboard?page=6032
Find the numbers missing from a sequence given a permutation of the original sequence
missing numbersleaderboardhackerrank
https://www.educative.io/courses/grokking-coding-interview-in-cpp/find-all-numbers-disappeared-in-an-array
Learn to find all missing numbers in an array within the range 1 to n using an optimal O(n) time and O(1) space approach.
missing numbersfindarray
https://www.tes.com/teaching-resource/missing-numbers-and-continuing-sequences-7536139
Differentiated sheets linked to missing numbers and continuing number sequences. Simple format, which can be adapted to most year groups.
missing numbersteaching resourcescontinuingsequences
https://www.educative.io/courses/grokking-coding-interview-in-python/find-the-first-k-missing-positive-numbers
Learn how to efficiently find the first k missing positive numbers in an unsorted array with cyclic sort and optimize for time and space complexity.
positive numbersfindfirstkmissing
https://housingrightscanada.com/beyond-the-numbers-whats-missing-from-the-budget/
Nov 10, 2025 - Despite new housing funds, Budget 2025 lacks clear targets for affordability, renter protections and meeting the needs of vulnerable communities.
federal budgetbeyondnumbersmissing