Copyright © 2002 by Rainer Typke
No zero occurs in this puzzle.
Across:
B: A cubic number
D: All digits of D across are the same
E: D across - B across
G: M across / B down
H: the reverse of E across
I: a prime number
K: the seventh power of some number
M: the digit sum of M across equals G across
Down:
A: K across - J down
B: a prime number whose reverse is a square number
C: a palindrome
D: all digits of D down are the same
F: C down * I across
J: a palindrome
K: a prime number
L: a palindrome