Answer:
1) 6394
2) 97, 9
Explanation:
1)
WXYZ
X < Z
Z = ⅔W
W = ⅔Y
Y = 3X
W = ⅔(3X) = 2X
Z = ⅔(2X) = (4/3)X
X has to be a multiple of 3
If X = 3,
Y = 9
Z = 4
W = 6
WXYZ
6394
2)
917452; 97452; 9745; 975; _ ; _ ?
Just remove the smallest digit to get the next terms
97, 9