1. Pandigital problems
Fill in digits 1-9 for a-i :
1) a/bc + d/ef + g/hi =1, here bc, ef , here treated as 2 digit number.
2) a/(b+c) + d/(e+f) + g/(h+i) =1.
3) a/(b*c) + d/(e*f) + g/(h*i) =1.
Solution
2. Cyclic polygons
3. Circulant numbers
4. Sum of consecutive positive integers