**Definition of Rule**

- Rule is the procedure that a count must follow.

**Example of Rule**

- 7, 16, 43,... is the pattern for which the rule is
**"Multiply by 3 and subtract by 5 to get the next number"**as each number is obtained by multiplying by 3 and then subtracting the result by 5 to get the next number.

- The first value in the input column is 3 and the output is 0. This is obtained by adding 2 to the input value and subtracting 5 from the result, i.e. 3 + 2 = 5 - 5 = 0. The second value in the input column is 6 and the output is 3. This is obtained by adding 2 to the input value and subtracting 5 from the resultant value, i.e. 3 + 2 = 5 - 5 = 0. The third value in the input column is 8 and the output is 5. This is obtained by adding 2 to the input value and subtracting 5 from the resultant value, i.e. 8 + 2 = 10 - 5 = 5. The fourth value in the input column is 10 and the output is 7. This is obtained by adding 2 to the input value and subtracting 5 from the resultant value, i.e. 10 + 2 = 12 - 5 = 7.

**Solved Example on Rule**

What is the rule for the table?

Choices:

A. Add 2 and multiply by 1.

B. Multiply by 2 and subtract 2.

C. Subtract 2 and add 4.

D. Divide by 2 and add 3.

Correct Answer: D

Solution:

Step 1:Consider the first input value given in the table and try each rule on the value to check if we get the corresponding output value.

Step 2:Consider 4, (4 + 2) × 1 = 6, not 5. So, choice 1 does not work.

Step 3:(4 × 2) - 2 = 6, not 5. So, choice 2 does not work.

Step 4:(4 - 2) + 4 = 6, not 5. So, choice 3 does not work.

Step 5:(4 ÷ 2) + 3 = 5, choice 4 works.

Step 6:So, 'divide by 2 and add 3' is the rule for the table.

**Related Terms for Rule**

- Count
- Number Patterns
- Pattern