Correct option is D
Given -(6, 4, 6)
(18, 9, 13)
(8, 6, ?)
The logic is:
Third Number=First Number−Second Number+4
Verification
(6, 4, 6)
6 − 4 + 4 = 6
(18, 9, 13)
18 − 9 + 4 = 13
(8, 6, ?)
8 − 6 + 4 = 6
Final Answer
The missing number is 6
Final Correct Option
(d) 6