Question

Find the missing number from the given alternative:

In a divided circle with values in sectors:

Top-Left: $3, 4 \rightarrow 75$
Top-Right: $7, 9 \rightarrow 390$
Bottom-Left: $11, 8 \rightarrow 555$
Bottom-Right: $13, 5 \rightarrow ?$

Accepted Answer

C. Pattern: Top-Left: $(3^2 + 4^2) 	imes 3 = (9 + 16) 	imes 3 = 75$ Top-Right: $(7^2 + 9^2) 	imes 3 = (49 + 81) 	imes 3 = 390$ Bottom-Left: $(11^2 + 8^2) 	imes 3 = (121 + 64) 	imes 3 = 555$ Bottom-Right: $(13^2 + 5^2) 	imes 3 = (169 + 25) 	imes 3 = 194 	imes 3 = 582$.

Circular Number Pattern Puzzle

Explanation

Practise this under exam conditions