A) 22
B) 20
C) 18
D) 15 (Olympiad)
Correct Answer: A
Solution :
As \[9-4=5\text{ }and\text{ }12-7=5\] and \[15-8=7\text{ }and\text{ }23-16=7\] Similarly, \[18-15=3\text{ }and\text{ }19-?=3\] \[?=3+19\] \[?=\] So, option [a] is correct.You need to login to perform this action.
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