    Puzzle #69  Used with permission. Copyright © Rainer Typke [www.crossnumber.com] No zeros occur in this puzzle. Across: A: none of the digits in A across occurs twice in A across. G: F' across / T down. H: the reverse of F down J: this prime number has the same digit sum as U down. K: all digits of K across are different and a multiple of 3. Also, K across equals P down multiplied with the digit sum of N across. M: M across equals J across - 1, and the reverse of M across equals U down - 1. N: a palindrome. P: N across multiplied with the digit sum of Q across. Q: this palindrome and prime number is a divisor of A down. R: a prime number whose reverse is also a prime number. S: a square number. V: a palindrome and prime number. X: a prime number. Y: this palindrome equals N across multiplied with the square root of U down. A': Z down divided by the digit product of A' across is a square number. B': this square number has the same digit sum as W down. D': a prime number. F': F' across equals the sum of G down and A across, and F' across is a multiple of T down. Down: A: a palindrome and cubic number. B: a prime number. C: P across multiplied with the digit sum of N across. D: a palindrome and prime number. E: the reverse of M across. F: twice I down divided by D' across. Also, the digit sum of F down equals the reverse of R across. G: this square number equals S across multiplied with B' across. I: I down has the same digit sum as F' across. L: the reverse of L down is prime, and L down equals the digit product of A' across. O: the digit product of O down is a square number. P: R across multiplied with the digit sum of N across. T: T down divided by X across equals the reverse of U down. U: a square number. W: W down divided by O down equals A' across. Y: every digit except the first one equals the previous digit plus one. Z: Z down equals 2 to the power of the digit sum of S across. C': a prime number. E': this prime number is a divisor of I down. View answer    