5. Find the number whose half is 6:

Solution:

The problem states that half of an unknown number is equal to 6.

• Let the unknown number be 'x'.
• The problem can be written as an equation: x / 2 = 6.
• To find 'x', we need to multiply both sides of the equation by 2: x = 6 * 2.
• x = 12.

Answer: 12