?
Find the missing number?
Find the missing number?
Answer & Solution
Correct Answer:
Option
B
Split the whole diagram in half, horizontally, to give two groups of 5 octagons. In each group, the central number in the top row equals the sum of the surrounding 4 numbers.
13 = 3 + 2 + 7 + 1
So,
14 = 6 + 3 + x + 1
x = 14 - 10 = 4.
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