A Number Pyramid is composed of the 10 different numbers 09 with
a top row of 1 number resting on a second row of 2 sitting on a third row
of 3 supported by a bottom row of 4. For example, a Number Pyramid
could be:
0
1 2
3 4 5
6 7 8 9
Given the clues below, can you determine the composition of Number
Pyramid 13?
 The four numbers in row 4 sum to 28.
 The biggest number in row 3 is in the middle of the row.
 The 3rd number from the left in the bottom row isn't 7.
 The rightmost numbers in the four rows total 11.
 0 and 5 are in different rows of Number Pyramid 13.
 The number at the apex minus the leftmost number in row 2 equals 4.
 The leftmost numbers in the four rows sum to 20.


