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2. Word problem (mathematics education) - Wikipedia

   en.wikipedia.org/wiki/Word_problem_(mathematics...

   For instance, if the one solving the math word problem has a limited understanding of the language (English, Spanish, etc.) they are more likely to not understand what the problem is even asking. In Example 1 (above), if one does not comprehend the definition of the word "spent," they will misunderstand the entire purpose of the word problem.

3. List of undecidable problems - Wikipedia

   en.wikipedia.org/wiki/List_of_undecidable_problems

   For functions in certain classes, the problem of determining: whether two functions are equal, known as the zero-equivalence problem (see Richardson's theorem); [4] the zeroes of a function; whether the indefinite integral of a function is also in the class. [5] Of course, some subclasses of these problems are decidable.

4. Elementary mathematics - Wikipedia

   en.wikipedia.org/wiki/Elementary_mathematics

   Although written in the form of proposition, an equation is not a statement that is either true or false, but a problem consisting of finding the values, called solutions, that, when substituted for the unknowns, yield equal values of the expressions A and B. For example, 2 is the unique solution of the equation x + 2 = 4, in which the unknown ...

5. Word problem (mathematics) - Wikipedia

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

   For example, if a is some element of X, then a ∨ 1 = 1 and a ∧ 1 = a. The word problem for free bounded lattices is the problem of determining which of these elements of W(X) denote the same element in the free bounded lattice FX, and hence in every bounded lattice. The word problem may be resolved as follows.

6. 10 of the Most Valuable Pennies - AOL

   www.aol.com/finance/10-most-valuable-pennies...

   1. 1943-D Lincoln Bronze Wheat Penny — $2.3 million Designed by Victor D. Brenner, this is one of the highest-value pennies in circulation today. During World War II , pennies were made of steel ...

7. List of primary education systems by country - Wikipedia

   en.wikipedia.org/wiki/List_of_primary_education...

   Primary school teaching in Italy consists of 5 grades. Before the First Grade, there is the kindergarten (scuola dell'infanzia in Italian), which is not compulsory and lasts 3 years. First grade (6–7 years) Second grade (7–8 years) Third grade (8–9 years) Fourth grade (9–10 years) Fifth grade (10–11 years)