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2. Word problem (mathematics education) - Wikipedia

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

   In science education, a word problem is a mathematical exercise (such as in a textbook, worksheet, or exam) where significant background information on the problem is presented in ordinary language rather than in mathematical notation. As most word problems involve a narrative of some sort, they are sometimes referred to as story problems and ...

3. List of unsolved problems in mathematics - Wikipedia

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

   Tutte's conjectures: every bridgeless graph has a nowhere-zero 5-flow [ 135] every Petersen - minor -free bridgeless graph has a nowhere-zero 4-flow [ 136] Woodall's conjecture that the minimum number of edges in a dicut of a directed graph is equal to the maximum number of disjoint dijoins.

4. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   The word mathematics comes from Ancient Greek máthēma (μάθημα), meaning "that which is learnt", [7] "what one gets to know", hence also "study" and "science". The word came to have the narrower and more technical meaning of "mathematical study" even in Classical times.

5. Word problem (mathematics) - Wikipedia

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

   In computational mathematics, a word problem is the problem of deciding whether two given expressions are equivalent with respect to a set of rewriting identities. A prototypical example is the word problem for groups, but there are many other instances as well. A deep result of computational theory is that answering this question is in many ...

6. Word problem for groups - Wikipedia

   en.wikipedia.org/wiki/Word_problem_for_groups

   Word problem for groups. In mathematics, especially in the area of abstract algebra known as combinatorial group theory, the word problem for a finitely generated group is the algorithmic problem of deciding whether two words in the generators represent the same element of . The word problem is a well-known example of an undecidable problem .

7. 71 (number) - Wikipedia

   en.wikipedia.org/wiki/71_(number)

   71 is the 20th prime number. Because both rearrangements of its digits (17 and 71) are prime numbers, 71 is an emirp and more generally a permutable prime. [ 1][ 2] 71 is a centered heptagonal number. [ 3] It is a Pillai prime, since is divisible by 71, but 71 is not one more than a multiple of 9. [ 4] It is part of the last known pair (71, 7 ...

8. 70 (number) - Wikipedia

   en.wikipedia.org/wiki/70_(number)

   70 is the fifth pentatope number. The sum of the first seven prime numbers aside from 7 (i.e., 2, 3, 5, 11, …, 19) is 70; the first four primes in this sequence sum to 21 = 3 × 7, where the sum of the sixth, seventh and eighth indexed primes (in the sequence of prime numbers) 13 + 17 + 19 is the seventh square number, 49 .

9. The internet can’t solve this third-grade math problem—can you?

   www.aol.com/article/lifestyle/2017/12/04/the...

   Reddit users went back and forth as to what the answer to the solution could possibly be, suggesting answers ranging from “some” to “ {15 – n n ∈ ℤ, 1<n<15}.”. Surprisingly, the real ...