In each line the numbers are arranged in accordance with some particular scheme. Write what two numbers should come next.
4, 7, 18, 21, 32 25, 36, 49, 64, 81 2160, 360, 72, 18, 6 3, 4, 12, 39, 103 750, 21, 264, 183, 210
Is it possible to write down 1,2,3..100 in some order (one after an other), such that the sum of any two adjacent numbers is a prime number?
The numbers 1 up to 16 must be placed in the circles of the square depicted below, in such a way that the sum of the numbers in each row, column, and diagonal amounts to 34. How should the numbers be arranged in the square?
You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)
