Number Puzzle Solution

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2.   Answer: 68.
Explanation: Sum of all the prime numbers in each star.

1. Looking at the diagram in rows, the central circle equals half the sum of the numbers in the other circles to the left and right of the centre.So, the solution is 6. 2. Solution is 40. Moving from left to right, numbers increase by 2,3,4 and 5. 3. The Sum of numbers in each column is 14. i.e 7 + 2 + 1 + 4 = 14      3 + 8 + 1 + 2 = 14      6 + 5 + 2 + 1 = 14      2 + 4 + 4 + ? = 14 So, the solution is 4. 4. From top to bottom, double each number and subtract 1, then 2, then 3 etc. i.e. 3 + 3 = 6 , 6-1=5       5 + 5 = 10 , 10-2=8       8 + 8 = 16 , 16-3=13      13 + 13 = 26, 26-4=22      22 + 22 = 44, 44-5 = 39 So, the solution is 39.