Question : Direction: If '+' means '-', '-' means 'x', 'x' means '/', '/' means '+', which combination will give you the value of '0' in 42 _ 4 _ 12 _ 20 _ 9?
Option 1: - / x +
Option 2: / + - x
Option 3: + - / x
Option 4: x - / +
Correct Answer:
- / x +
Solution : Given:
42 _ 4 _ 12 _ 20 _ 9 = 0.
By substituting the signs '+' means '-', '-' means 'x', 'x' means '/', '/' means '+', in all the options for the given equation-
Option first: - / x +. On substituting the signs we get: x + / -
42 x 4 + 12 / 20 - 9 =
Option second: / + - x. On substituting the signs we get: + - x /
42 + 4 - 12 x 20 / 9 =
Option third: + - / x. On substituting the signs we get: - x + /
42 - 4 x 12 + 20 / 9 =
Option fourth: x - / +. On substituting the signs we get: / x + -
42 / 4 x 12 + 20 - 9 =
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