Question

Which one of the four interchanges in symbols and numbers would make the given equation correct ?
Given equation: 3+ 5 - 2 = 4

• A. + and -; 2 and 3
• B. + and -; 2 and 5
• C. + and -; 3 and 5
• D. None of these

Answer 1

Answer: (C)

+ and -; 3 and 5

Check every alternative by interchanging the symbols and numbers in the given equation.
1. On interchanging the symbols and numbers as given in alternative (1) the given equation becomes
2 - 5 + 3= 4
LHS = 2 - 5 + 3 = 5 - 5 = 0 $\ne$ 4.
So, this option does not hold good.
2. On interchanging the symbols and numbers as given in alternative (2), the given equation becomes
3 - 2 + 5 = 4
LHS = 3 - 2 + 5 = 8 - 2 = 6 $\ne$ 4.
So, this option also does not hold good.
3. On interchanging the symbols and numbers as given in alternative (3) the given equation becomes-1 5 - 3 + 2 = 4
LHS = 5 - 3 + 2 = 7 - 3 = 4 = RHS.
So, this option holds good.