Number System

The given series is -- 173, 192, 211, 230
Consequtive numbers increases by 19
Following this pattern, the Missing Number should increase by 19 from the previous number.
When we add 19 to the last number (i.e 230) we get 230+19=249

The given series is -- 173, 154, 135, 116
Consequtive numbers decreases by 19
Following this pattern, the Missing Number should decrease by 19 from the previous number.
When we subract 19 to the last number (i.e 116) we get 116-19= 97

The given series is -- 173, 190, 207, 224
Consequtive numbers increases by 17
Following this pattern, the Missing Number should increase by 17 from the previous number.
When we add 17 to the last number (i.e 224) we get 224+17=241

Details

The given series is 117, 88, 59, X , 1, -28
Consequtive numbers decreases by 29
Following this pattern, the Missing Number X should decrease by 29 from the previous number.
When we subract 29 to the number before X (i.e 59) we get 59 - 29 = 30

The given series is -- 117, 146, 175, X , 233, 262
Consequtive numbers increases by 29
Following this pattern, the Missing Number X should increase by 29 from the previous number.
When we add 29 to the number before X (i.e 175) we get 175+29=204

The given series is -- 117, 92, 67, X , 17, -8
Consequtive numbers decreases by 25
Following this pattern, the Missing Number X should decrease by 25 from the previous number.
When we subract 25 to the number before X (i.e 67) we get 67--25=42

The given series is -- 117, 142, 167, X , 217, 242
Consequtive numbers increases by 25
Following this pattern, the Missing Number X should increase by 25 from the previous number.
When we add 25 to the number before X (i.e 167) we get 167+25=192

The given series is -- 117, 138, 159, X , 201, 222
Consequtive numbers increases by 21
Following this pattern, the Missing Number X should increase by 21 from the previous number.
When we add 21 to the number before X (i.e 159) we get 159+21=180

The given series is -- 117, 94, 71, X , 25, 2
Consequtive numbers decreases by 23
Following this pattern, the Missing Number X should decrease by 23 from the previous number.
When we subract 23 to the number before X (i.e 71) we get 71--23=48