Question

someone in your kick and connect has decided they want to bring cookies to next check and connect party but not just any cookies crumble cookies the group decided to order one per person for 18 people that do do before the Texas number 7.76 where the number represents an anointed what is the anointed how much the tickets cost

Answer 1

Solution:

Concept:

To solve this question, we will use the divisibility rule for 18

Divisibility of 18 – A number is divisible by 18 if the number is divisible by both 2 and 9.

From the question,

Divisibility of 9 – A number is divisible by 9 if the sum of all the digits is divisible by 9.

The total before tax given is

$\text{ \ \#7.76}$

Step 1:

From the question, we can see that the total amount is divisible by 2 because the amount ends with an even number 6

Step 2:

Figure out the number so that it can be divisible by 9

Divisibility of 9 – A number is divisible by 9 if the sum of all the digits is divisible by 9.

The total before tax given is

Let the unknown number be

$=x$

The sum of the number will be

$\begin{gathered} d+7+7+6 \\ =d+20 \end{gathered}$

By try and error method

The only number divisible by 9 from 20 to 30 is

$=27$

Hence,

$\begin{gathered} d+20=27 \\ d=27-20 \\ d=7 \end{gathered}$

Therefore,

The unknown digit is = 7

Each cookie will cost

$\begin{gathered} =\frac{\text{the total amount}}{\text{ number}} \\ =\frac{77.76}{18} \\ =\text{ \ 4.32} \end{gathered}$

Hence,

Each cookie will cost = $4.32