Missing Number – Railway Reasoning part – 1

Logic : - Difference between consecutive numbers in row = ?
11, 8, 5, 2 = 3
11 - 8 = 3, 5 - 2 = 3
19, 14, 9, 4 = 5
19 - 14 = 5, 9 - 4 = 5
Similarly,
27, 20, 13, 6
27 - 20 = 7, 13 - 6 = 7

36 + 58 + 21 = 115 ÷ 5 = 23
41 + 39 + 20 = 100 ÷ 5 = 20
Similarly,
39 + 52 + 34 = 125 ÷ 5 = 25

69, 87 = 39 ⇒ (69 + 87)/4 = 39
93, 95 = 47 ⇒ (93 + 95)/4 = 47
52, 64, = ? ⇒ (52 + 64)/4 = 29

Here the pattern is,
For the first column ⇒ (28 + 8) = 36 = 6²
For the second column ⇒ (63 + 18) = 81 = 9²
Similarly,
For the third column ⇒ (94 + x) = 13² = 169
⇒ x = (169 - 94) = 75
So, the missing number = 75.

In the first column, the difference between the first and second number is equal to the difference between the third and fourth number
= [(14 - 10) = (12 - 8) = 4]
Similarly, for the second column
= [(12 - 8) = (18 - 14) = 4]
Similarly, for the third column
= [(10 - 2) = (14 - 6) = 8]
Similarly, for the fourth column
= [(8 - 4) = (? - 16)] ⇒ ? = 20

For the first row, 5³ + 4² = 125 + 16 = 141
for the second row, 6³ + 2² = 216 + 4 = 220
Similarly, for the third row, 7³ + 3² = 343 + 9 = 352

From the above diagram,
In the first column, (7 - 5) × 6 = 12
In the second column , (8 - 2) × 5 = 30
In the third column, (5 - 2) × 4 = 12
So, in the fourth column, (8 - 3) × 7 = 35

Given, 243 (222) 317,
i.e.{(317 - 243) × 3} = 74 × 3 = 222
Then, 548 (?) 621 ⇒
= {(621 — 548) × 3} = 73 × 3 = 219
So, the pattern will be 548 (219) 621.

30 - 12 + 2 = 20
42 - 14 + 2 = 30
56 - 16 + 2 = 42