Math Problem Statement

(b) A group of children bought some apples. Each apple is cut into 4 equal pieces and divided by 1 piece, leaving 3 pieces. And when each apple was cut into 3 equal pieces, two pieces were not enough. Find the number of children and the number of apples by writing a pair of simultaneous equations, taking the number of children as x and the number of apples as y.

Solution

To solve the problem, we need to establish two equations based on the information provided.

Let's denote:

  • xx as the number of children.
  • yy as the number of apples.

Step 1: Formulate the first equation

The first scenario states that each apple is cut into 4 equal pieces. Each child receives 1 piece, leaving 3 pieces.

So, the total number of pieces obtained from yy apples is 4y4y. If each of the xx children receives 1 piece, the equation will be: x=4y3x = 4y - 3

Step 2: Formulate the second equation

The second scenario states that each apple is cut into 3 equal pieces. Two pieces were not enough for all the children.

So, the total number of pieces obtained from yy apples is 3y3y. Since two pieces were not enough, it implies that the total number of children is two less than the total number of pieces: x=3y+2x = 3y + 2

Step 3: Set up the simultaneous equations

The two equations we derived are: x=4y3(Equation 1)x = 4y - 3 \quad \text{(Equation 1)} x=3y+2(Equation 2)x = 3y + 2 \quad \text{(Equation 2)}

Step 4: Solve the simultaneous equations

Set the equations equal to each other to eliminate xx: 4y3=3y+24y - 3 = 3y + 2 Subtract 3y3y from both sides: y3=2y - 3 = 2 Add 3 to both sides: y=5y = 5

Now that we have yy, substitute it into one of the original equations to find xx. Using Equation 2: x=3(5)+2=15+2=17x = 3(5) + 2 = 15 + 2 = 17

Final Answer:

  • The number of children (xx) is 17.
  • The number of apples (yy) is 5.

Would you like more details or have any questions?


Here are 5 related questions that might interest you:

  1. What happens if each apple is cut into 5 equal pieces?
  2. How would the equations change if two pieces were left in the first scenario?
  3. Can you solve a similar problem where each apple is divided into 6 pieces?
  4. What is the solution if instead of apples, oranges are divided into 4 and 3 pieces?
  5. How would the solution differ if the number of leftover pieces in the first scenario was 4 instead of 3?

Tip: Always double-check your equations by substituting your final values back into the original conditions to ensure accuracy.

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Math Problem Analysis

Mathematical Concepts

Simultaneous Equations
Word Problems

Formulas

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Theorems

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Suitable Grade Level

Grades 7-9