Question

Today when Jeremy saw Mr. Winaki, the teacher said, “The amount of money in my wallet is more than $10, but less than $20. How much do I have?” Jeremy remembers talking about inequalities in math class and thinks that the answer may have something to do with that idea. In the Math Toolbox, we helped Jeremy solve Mr. Winaki’s riddle. Now, Jeremy needs help in writing a brainteaser to stump Mr. Winaki.

Your original riddle needs to be a real world problem that has an answer of more than 19 and less than 41.

1. Brainstorm
Think about possible real world situations that might have an answer of more than 19 and less than 41. List three ideas for your original riddle.

Answer 1

Answer:

Given that “The amount of money in my wallet is more than $10, but less than $20 " can be written in inequality form as

10 < w <  20   where  " w"  is the amount in the wallet .

1 ) Puzzle : -

Ryan  is eating cookies . His mother ask how many cookies did he have .

He said number of cookies he ate is more than 19 and less than 41 .

We can write it in equality form as  19 < x < 41 where  ' x ' is number of cookies Ryan have .

2) Puzzle :-

Number of steps a child take in an hour is more than 19 and less than 41 .

Write the situation in inequality form .

19 < p < 41 where  " p " is the number of steps a child take in an hour .

3) Puzzle :-

Mother said to his child : " the number of  coins in your piggy bank is more than 19 and less than 41 .

19 < c < 41  where " c " is number of coins in piggy bank .