Find the missing number?
A. 1
B. 8
C. 4
D. 7
Answer: Option A
Solution (By Examveda Team)
Splitting the diagram into 3 smaller triangles, with 3 circles each, the sum of the numbers in each smaller triangle is always 21. So, 3 +7 + 11 = 21. 5 + 12 + 4 = 21. 10 + 10 + x = 21. x = 1. Missing Number = 1.
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