(64 votes, average: 3.64 out of 5)Solve this one in a minute
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Box 1 (top left)
Box 2 (top right)
Box 3 (bottom left)
Box 4 (top right)
Click here to See SolutionLet’s quickly write the equations
B1 + B2 = 14
B1 + B3 = 15
B2 + B4 = 16
B3 – B4 = 10
by adding all equations
B1 + B2 + B3 = (14 + 15 + 16 + 10 )/2 = 55/2 = 27.5
B3 = 27.5 – (B1 + B2) = 27.5 – 14 = 13.5 => B3 = 13.5
B2 = 27.5 – (B1 +B3) = 27.5 – 15 = 12.5 => B2 = 12.5
B1 = 14 – B2 = 14 – 12.5 = 1.5 => B1 = 1.5
B4 = B3 – 10 = 13.5 – 10 = 3.5 => B4 = 3.5
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