For this kind of question, you want to find the remainder after you divide the number in the boxes by the…”frequency”?
So for the question above, the arrangement pattern is
A – B – C – D – (repeat) – A – B – C – D
This has a frequency of 4, ie, the pattern repeats after every 4 numbers.
So you divide the numbers in the boxes by 4, and you will realise that under column A, the remainders are always 0, always 1 under B, always 2 under C, and always 3 under D.
A 
B 
C 
D 


6 / 4 > 1R2 
7/4 > 1R3 
8/4 > 2R0 
9/4 > 2R1 
10/4 > 2R2 
11/4 > 2R3 
12/4 > 3R0 
13/4 > 3R1 
14/4 > 3R2 
15/4 > 3R3 
Therefore, 134 / 4 > 33 R 2 can be found in column C.
Likewise for your second question, the pattern is
A – B – C – D – D – C – B – A – (repeat) – A – B – C – D – D – C – B – A
This has a frequency of 8, so you find the remainder by dividing by 8.
A 
B 
C 
D 
2/8 > 0R2 
3/8 > 0R3 
4/8 > 0R4 
5/8 > 0R5 
9/8 > 1R1 
8/8 > 1R0 
7/8 > 0R7 
6/8 > 0R6 
10/8 > 1R2 
11/8 > 1R3 
12/8 > 1R4 
13/8 > 1R5 
The number 234 when divided by 8 has a remainder of 2, so it will be in column A.