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2. Bedtime Math - Wikipedia

   en.wikipedia.org/wiki/Bedtime_Math

   Bedtime Math's main offering is daily math problems for elementary school-age kids, broadcast by email and posted daily on the website's homepage and Facebook page. [4] Apps: The organization delivers the same daily riddles via a free mobile application for Android and iPhone OS. [5]

3. Keisan Game - Wikipedia

   en.wikipedia.org/wiki/Keisan_Game

   Four modes are utilized, two for multiplication and two for division. These game modes contain short minigames where solving the displayed math problems correctly results in positive feedback. The division rounds allow players to control a submarine, while the multiplication rounds allow the players to become space cadets and car

4. List of unsolved problems in mathematics - Wikipedia

   en.wikipedia.org/wiki/List_of_unsolved_problems...

   Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

5. Singapore math - Wikipedia

   en.wikipedia.org/wiki/Singapore_math

   The student could solve this multiplication problem by drawing one bar to represent the unknown answer, and subdivide that bar into four equal parts, with each part representing $30. Based on the drawn model, the student could then visualize this problem as providing a solution of $120.

6. 24 (puzzle) - Wikipedia

   en.wikipedia.org/wiki/24_(puzzle)

   The original version of 24 is played with an ordinary deck of playing cards with all the face cards removed. The aces are taken to have the value 1 and the basic game proceeds by having 4 cards dealt and the first player that can achieve the number 24 exactly using only allowed operations (addition, subtraction, multiplication, division, and parentheses) wins the hand.

7. 10 Hard Math Problems That Even the Smartest People in the ...

   www.aol.com/10-hard-math-problems-even-150000090...

   Goldbach’s Conjecture. One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes ...