The standard or normal magic square is defined as an arrangement of the first n2 natural numbers (or positive integers) into a square matrix so that the sum of the numbers in each column, row and diagonal is the same magic number. This magic number is determined by n and is equal to n(n2 + 1)/2.
As mentioned above, the formula of the magic square sum is n(n2 + 1)/2. For a magic square of order 3, we need to substitute n = 3 to know the magic sum so that we can easily form the magic square 3×3.
Solving a 3-by-3 Square
Given a little thought, I found that there is a simple calculation to find the “magic number” of any sized grid: Take the sum of every number on the board and divide it by the number of rows. In this case, the magic number is 1+2+… +9 = 45 / 3 = 15.
Take a 3x3 box like the one at right and fill it with the digits 1-9, using each digit only once. The Magic Square is complete when all rows, all columns, and both diagonals add up to the same number. That's it!
Note that with a 3x3 magic square, there are only 9! = 362880 possibilities, so it's quite easy to try them all.
The pattern was a 3x3 grid of nine squares, each containing one of the numbers between 1 and 9. No matter which way the 3 numbers in each row, each column and both diagonals of the square were added, the sum was always 15. This arrangement is what we now know as the 3x3 magic square.
The original 3x3x3 Rubik's cube has 43 252 003 274 489 856 000 combinations, or 43 quintillion.
A 3 x 3 magic square always has the sum of 15 and a 4 x 4 has a sum of 34.
Math Trick to find Square of Three Digit Numbers:
The rightmost part(1) will be duplex of 'c', the next part(2) will be duplex of bc, the middle part(3) will be duplex of 'abc', the next part(4) will be duplex of ab and finally the left most part(5) will be duplex of 'a'.
For the purposes of this post, a magic square is a square arrangement of non-negative numbers such that the rows and columns all sum to the same non-negative number m called the magic constant. Note that this allows the possibility that numbers will be repeated, and this places no restriction on the diagonals.
Discovered by mathemagician Srinivas Ramanujan, 1729 is said to be the magic number because it is the sole number which can be expressed as the sum of the cubes of two different sets of numbers. Ramanujan’s conclusions are summed up as under: 1) 10 3 + 9 3 = 1729 and 2) 12 3 + 1 3 = 1729.
Assign each box of the 2x2 grid a distinct number. Recall that the numbers in each box of the grid must be distinct and that the sum of the columns, rows, and diagonals must all be the same. Then, x1+x2 = x1+x3, which implies x2 = x3. Or, x3+x4 = x2+x3, which implies x2+x4.
A number is perfect if all of its factors, including 1 but excluding itself, perfectly add up to the number you began with. 6, for example, is perfect, because its factors — 3, 2, and 1 — all sum up to 6. 28 is perfect too: 14, 7, 4, 2, and 1 add up to 28. But perfect numbers aren't common at all.
Finding a number's square is as simple as multiplying it by itself.
Finding the Square of a Number is a simple method. We need to multiply the given number by itself to find its square number. The square term is always represented by a number raised to the power of 2. For example, the square of 6 is 6 multiplied by 6, i.e., 6×6 = 62 = 36.
The number 15 is called the magic number of the 3x3 square. You can also achieve 15, if you add the middle number 5 three times. The odd numbers 1,3,7, and 9 occur twice in the reductions, the even numbers 2,4,6,8 three times and the number 5 once.
9 , 18 , 27 , 36 , 45 , 54 , 63 , 72 , 81 . The sum of the numbers of each row, and column and diagonal is the same in a magic square and the sum is called magic number.
Smallest and Largest N-Digit Perfect Cubes
Smallest 3-digit perfect cube is 120 and the largest 3-digit perfect cube is 729.
We now know that 5 must be in the center cell, so the number in the diagonally opposite cell from 1 must be 9. Now, in order to sum to 15 the top row must contain the numbers 1, 6, and 8.
The sum is referred to as the magic constant. For a 3x3 magic square, there is actually only one normal solution and all of the puzzles are derived from rotations or reflections of that puzzle. The normal variations of these puzzles (the 3x3 puzzles that contain only 1-9) will have a magic constant of 15.