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2. Numberblocks - Wikipedia

   en.wikipedia.org/wiki/Numberblocks

   Many of the numbers have styles and personalities associated with their numbers (One is brave and independent, Four loves squares as he is a square number, Seven is rainbow-coloured and lucky due to the superstition behind that number, Eight has octopus-like tentacles as octopuses have 8 tentacles, Eleven loves football as a football team has ...

3. Square number - Wikipedia

   en.wikipedia.org/wiki/Square_number

   A non-negative integer is a square number when its square root is again an integer. For example, =, so 9 is a square number. A positive integer that has no square divisors except 1 is called square-free. For a non-negative integer n, the n th square number is n 2, with 0 2 = 0 being the zeroth one. The concept of square can be extended to some ...

4. Murderous Maths - Wikipedia

   en.wikipedia.org/wiki/Murderous_Maths

   The following are the thirteen books that are available in the series. Guaranteed to Bend Your Brain (previously Murderous Maths) (1997), ISBN 0-439-01156-6 - (addition, subtraction, multiplication, division, percentages, powers, tessellation, Roman numerals, the development of the "10" and the place system, shortcomings of calculators, prime numbers, time - how the year and day got divided ...

5. 25 (number) - Wikipedia

   en.wikipedia.org/wiki/25_(number)

   25 is the sum of the five consecutive single-digit odd natural numbers 1, 3, 5, 7, and 9. 25 is a centered octagonal number, [1] a centered square number, [2] a centered octahedral number, [3] and an automorphic number. [4] 25 percent (%) is equal to ⁠ 1 / 4 ⁠. It is the smallest decimal Friedman number as it can be expressed by its own ...

6. Mathnet - Wikipedia

   en.wikipedia.org/wiki/Mathnet

   By the time production ended on the third season and its six episodes in 1989, Beverly Leech (Kate Monday) left, and was replaced by a new character named Pat Tuesday, played by Toni DiBuono. Production on the first six episodes with the new character commenced in 1990, and ended in 1991, in time for Square One TV's fourth season. Production on ...

7. Magic triangle (mathematics) - Wikipedia

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

   [5] (sequence A356808 in the OEIS) Its one modification uses triangular numbers instead of square numbers. (sequence A355119 in the OEIS) Another magic triangle form is magic triangles with triangular numbers with different summation. In this magic triangle, the sum of the k-th row and the (n-k)-th row is same for all k.