Answer:
the missing value is 40 .
Explanation:
if observed clearly the difference between every number is 9.
so 31+9 = 40 is the correct answer.
hope this helps you.
the answer is 40
in
X 1 (+1) 2 (+1) 3 (+1) 4 (+1) 5
Y 4 (+9) 13 (+9) 22 (+9) 31 (+9) 40
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