Used with permission. Copyright © Rainer Typke [www.crossnumber.com]
B: the digit product of G across minus one.
E: a palindrome and prime number.
F: a prime number.
G: A prime numbe.
H: F across - B across.
I: I across divided by the digit sum of E across equals the digit sum of B down plus the digit sum of C down.
J: a cubic number.
K: A prime number.
L: K across multiplied with the digit sum of J across.
A: A down has the same digit sum as B down, and A down equals H across squared.
B: E across squared.
C: G across squared.
D: F across squared.