1.  The given equation becomes correct due to the interchange of two signs. One of the four alternatives under it specifies the interchange of signs in the equation which when made will make the equation correct. Find the correct alternative.
5 + 6 % 3 - 12 * 2 = 17

% and *
+ and *
+ and %
+ and -

```Answer

Answer: Option  A Explanation:On interchanging % and *, we get:
Given expression = 5 + 6 * 3 - 12 % 2 = 5 + 6 * 3 - 6 = 5 + 18 - 6 = 5 + 18 - 6 = 17  ```

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2.  The given equation becomes correct due to the interchange of two signs. One of the four alternatives under it specifies the interchange of signs in the equation which when made will make the equation correct. Find the correct alternative.
9 + 5 % 4 + 5 * 2 = 8

+ and *
% and *
% and -
+ and -

```Answer

Answer: Option  C Explanation:On interchanging % and -, we get :
Given expression = 9 + 5 - 4 * 3 % 6 = 9 + 5 - 4 * 1⁄2 = 9 + 5 -2 = 12 ```

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3.  The given equation becomes correct due to the interchange of two signs. One of the four alternatives under it specifies the interchange of signs in the equation which when made will make the equation correct. Find the correct alternative.
2 * 3 + 6 - 12 % 4 = 17

* and +
+ and *
+ and %
- and +

```Answer

Answer: Option  A Explanation:On interchanging * and +, we get :
Given expression = 2 + 3 * 6 - 12 % 4 = 2 + 3 * 6 - 3 = 2 + 18 - 3 = 17 ```

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4.  10 + 10 % 10 - 10 * 10 = 10

+ and -
+ and %
+ and *
% and +

```Answer

Answer: Option  C Explanation:On interchanging + and *, we get the equation as :
10 * 10 % 10 - 10 + 10 = 10 or 10 * 1 - 10 = 10 or 10 = 10, which is true. ```

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5.  which of the following meaning of the arithmetical signs will yield the value 'zero' for the expression given below ?
200 * 100 + 300 * 200 - 10 ÷ 2 + 40

+ means -, - means *, * means ÷, ÷ means +
+ means -, - means ÷, * means +, ÷ means *
+ means *, - means -, * means ÷, ÷ means +
+ means ÷, - means +, * means -, ÷ means *

```Answer

Answer: Option  B Explanation:Using the operations given in (b), we get the given expression as :
200 + 100 - 300 + 200 ÷ 10 * 2 - 40 = 300 - 300 + 20 * 2 - 40
=0 + 40 - 40 = 0. ```

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