Given intercharges :
Signs + and x and numbers 4 and 5.
Option:
A. 5 x 4 + 20 = 40
B. 5 x 4 + 20 = 85
C. 5 x 4 + 20 = 104
D. 5 x 4 + 20 = 95
Answer: C . 5 x 4 + 20 = 104
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Justification:
On interchanging + and x and 4 and 5 in (c),
we get the equation as
4 + 5 x 20 = 104 or 104 = 104,
which is true.
