Give interchanges :
Signs - and x and numbers 3 and 6.
Option:
A. 6 - 3 x 2 = 9
B. 3 - 6 x 8 = 10
C. 6 x 3 - 4 = 15
D. 3 x 6 - 4 = 33
Answer: B . 3 - 6 x 8 = 10
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Justification:
On interchanging - and x and 3 and 6 in (b),
we get the equation as
6 x 3 - 8 = 10
or 18 - 8 = 10
or 10 = 10, which is true.
