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2. Ages of Three Children puzzle - Wikipedia

   en.wikipedia.org/wiki/Ages_of_Three_Children_puzzle

   B. 3 + 3 + 8 = 14. In case 'A', there is no 'eldest child': two children are aged six (although one could be a few minutes or around 9 to 12 months older and they still both be 6). Therefore, when told that one child is the eldest, the census-taker concludes that the correct solution is 'B'. [3]

3. Bedtime Math - Wikipedia

   en.wikipedia.org/wiki/Bedtime_Math

   Apps: The organization delivers the same daily riddles via a free mobile application for Android and iPhone OS. [5] Books: Laura Overdeck has also published four children's books; her book royalties are donated toward Bedtime Math's programming. [6] Bedtime Math: A Fun Excuse to Stay Up Late (Macmillan Children's Publishing Group, June 2013)

4. Exercise (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Exercise_(mathematics)

   At the Russian School of Mathematics, students begin multi-step problems as early as the first grade, learning to build on previous results to progress towards the solution. In the 1960s, collections of mathematical exercises were translated from Russian and published by W. H. Freeman and Company : The USSR Olympiad Problem Book (1962), [ 8 ...

5. 45 Best Bible Riddles You’ll Have Fun Solving

   www.aol.com/45-best-bible-riddles-ll-155811658.html

   See how well those Sunday school lessons paid off with these Christian riddles for kids. The post 45 Best Bible Riddles You’ll Have Fun Solving appeared first on Reader's Digest.

6. Puzzle - Wikipedia

   en.wikipedia.org/wiki/Puzzle

   In certain regions, PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition and Subtraction) is the synonym of BODMAS. It explains the order of operations to solve an expression. Some mathematical puzzles require top to bottom convention to avoid the ambiguity in the order of operations.

7. Multiplication - Wikipedia

   en.wikipedia.org/wiki/Multiplication

   Four bags with three marbles per bag gives twelve marbles (4 × 3 = 12). Multiplication can also be thought of as scaling. Here, 2 is being multiplied by 3 using scaling, giving 6 as a result. Animation for the multiplication 2 × 3 = 6 4 × 5 = 20. The large rectangle is made up of 20 squares, each 1 unit by 1 unit.