X, Y and Z are 3 distinct even integers ranging from 1 to 25. Which of the following is necessarily true?
1. XY/Z is an even integer.
2. 17XY3 is an even integer
3. 8 YX/Z is an even integer
4. 3Y(ZX) is an even integer
Only 2 and 4 are true because they are multiple of 2
0, 2, 8, 14, ?, 34
1, 4, 2, 8, 6, 24, 22, 88, ?
1, 4, 9, 16, 25, ?
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