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We know that,
Available resources,
Stone = 18
Wood = 12
Metal = 9

Required resources for castle,
Stone = 6
Wood = 2
Metal = 1

Required resources for mansion,
Stone = 4
Wood = 6
Metal = 2

Max number of castles possible
Let number of castles be x
=> Stone = 6x <= 18 => x <= 3
=> Wood = 2x <= 12 => x <= 6
=> Metal= 1x <= 9 => x <= 9
Min(3,6,9) = 3

Therefor, max number of castles = 3


Max number of mansions possible
Let number of mansions be y
=> Stone = 4y <= 18 => y <= 4.5
=> Wood = 6y <= 12 => y <= 2
=> Metal= 2y <= 9 => y <= 4.5
Min (4.5,2) = 2

Therefor, max number of mansions = 2

Castles = 3
Mansions = 2
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Requirement for Castle

Wood=2units
Stone=6units
Metal=(2/2)=1unit

Mansion requirement
Wood=6units
stone=4 units
Metal=((6+4)/5)*1=2 units

Resources

Stone= 18 units
wood=(2/3*18)= 12 units
Metal =(1/2*18)=9 units

Maximum castle that can be built

Identify the Highest resource requirement which is Stone

18/6 = 3castles

Identify highest resource requirement for mansion which is wood

12/6= 2mansions
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Bunuel
 


This question was provided by GMAT Club
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In the computer game Stoneforge Dominion, a player can use available resources to build castles and mansions. Each structure must be built using a specific ratio of three components: stone, wood, and metal.

  • A castle requires 2 units of wood, along with three times as much stone as wood, and twice as much wood as metal.
  • A mansion requires 6 units of wood, along with 2 units of stone for every 3 units of wood, and 1 unit of metal for every 5 units of total wood and stone combined.

The player has 18 units of stone, along with two-thirds as much wood and half as much metal as stone.

Select for Castle the maximum number of complete castles the player can build, and select for Mansion the maximum number of complete mansions the player can build, using the available resources. Make only two selections, one in each column.
Castle requirements:
Wood = 2units
Stone = 6units
Metal = 1 unit

Mansion requirements:
Wood = 6units
Stone = 2 units for every 3 units of wood.
We have 6 units of wood.
=> Stone = 4units
Metal = 1 unit of metal for every 5 units of total wood and stone combined
We have combined 10 units
=> Metal =2units

Player resources:
Wood = 2/3*18 = 12units
Stone = 18units
Metal = 18/2= 9units

Now maximum castles =
Stone = 18units
Per castle we need 6 units of Stone.
Hence maximum castles =3

Now maximum mansions=
Wood = 12units
Per mansion we need 6units of wood
Hence maximum mansions =2

ANSWER:
Castles= 3
Mansions = 2
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Given,
Stone: 18 units
Wood = 2/3*18 = 12 units
Metal = 1/2*18 = 9 units
For building a caste, we need
Wood: 2 units
Stone = 3*2 = 6 units
Metal = 2/2 = 1 unit

Maximum Castles that can be built with available resources:
Stone: 18/6 = 3
Wood: 12/2 = 6
Metal: 9/1 = 9
The lowest out of all three is 3.

For building a mansion, we need
Wood: 6 units
Stone = (2/3)*6 = 4 units
Metal = 10/5 = 2 units
Maximum Mansion that can be built with available resources:
Stone: 18/4 = 4.5 => 4 (number of mansions has to be an integer)
Wood: 12/6 = 2
Metal: 9/2 = 4.5 => 4
The lowest out of all three is 2.

Therefore,
Maximum number of complete castles the player can build: 3
Maximum number of complete mansions the player can build: 2

Bunuel
 


This question was provided by GMAT Club
for the GMAT Club Olympics Competition

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In the computer game Stoneforge Dominion, a player can use available resources to build castles and mansions. Each structure must be built using a specific ratio of three components: stone, wood, and metal.

  • A castle requires 2 units of wood, along with three times as much stone as wood, and twice as much wood as metal.
  • A mansion requires 6 units of wood, along with 2 units of stone for every 3 units of wood, and 1 unit of metal for every 5 units of total wood and stone combined.

The player has 18 units of stone, along with two-thirds as much wood and half as much metal as stone.

Select for Castle the maximum number of complete castles the player can build, and select for Mansion the maximum number of complete mansions the player can build, using the available resources. Make only two selections, one in each column.
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W S M
Castle 2 6 1
Mansion 6 4 2
Available 12 18 9

Thus we can make 3 castles and 2 mansions max
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Based on the given constraints a castle requires 2 units of wood, 6 units of stones and 1 unit of metal
Based on the given constraints a mansion requires 6 units of wood, 4 units of stones and 2 unit of metal
Available resources 12 units of wood, 18 units of stones and 9 unit of metal

To find max castles and mansions divide each type of resource with the required resource for each type and select the least value because that marks the resource threshold
So castles = 18/6= 3
Mansions 12/6 =2
Bunuel
 


This question was provided by GMAT Club
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In the computer game Stoneforge Dominion, a player can use available resources to build castles and mansions. Each structure must be built using a specific ratio of three components: stone, wood, and metal.

  • A castle requires 2 units of wood, along with three times as much stone as wood, and twice as much wood as metal.
  • A mansion requires 6 units of wood, along with 2 units of stone for every 3 units of wood, and 1 unit of metal for every 5 units of total wood and stone combined.

The player has 18 units of stone, along with two-thirds as much wood and half as much metal as stone.

Select for Castle the maximum number of complete castles the player can build, and select for Mansion the maximum number of complete mansions the player can build, using the available resources. Make only two selections, one in each column.
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The correct selections are Castles (3) and Mansions (2)

To solve this question I first wrote out the numbers associated with each type of building type and the material it requires. Then I could determine numbers of each building type based on the material it requires the most of / how many total buildings can be made from that material.

Castle: 2 Wood, 6 Stone, 1 Metal
Mansion: 6 Wood, 4 Stone, 1.2ish Metal

Player: 18 Stone, 12 Wood, 9 Metal
Castles - restricted by Stone, so 18 stones -> 6 needed per castle = 3 castles max
Mansions - restricted by Wood, so 12 wood -> 6 needed per castle = 2 mansions max
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Castle requierements: 2 wood, 6 stone, 1 metal
Mansion requierements: 6 wood, 4 stone, 2 metal

There are 12 wood, 18 stone, 9 metal

3 castles using using 6 wood, 18 stone, 3 metal (run out of stones to be able to build more castles)
2 mansion using 12 wood, 8 stone, 4 metal (run out of wood to be able to build more castles)

Correct answers: Castle=3 and Mansion=2
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Lets make use of given constraints.

Wood Stone Metal
Castel 2 6 1

Mansion 6 4 2

Available 12 18 9


Stone is most required in Castel and can only make max castles = 3.

Wood is most required in Mansion and can only make max mansion = 2.

Other materials are sufficiently available.

Hence, max castles = 3 and max mansion = 2
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For castle are needed: 2 wood, 3 * 2 = 6 stone, 2/2 = 1 metal
For mansion are needed: 6 wood, 2 * 6/3 = 4 stone, (6 + 4)/5 = 2 metal

We have 18 stone, 18 * 2/3 = 12 wood, 18/2 = 9 metal

Restrictive element for castle is stone: 3 castles: 6 wood 18 stone 3 metal

Restrictive element for mansion is wood: 2 mansion: 12 wood 8 stone 4 metal

Castle=3
Mansion=2
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Given:
castel need:
2 woods, stone=3*2=6 stones and Metal=2/2=1 metal.
2:6:1
Mansion requires:
6 woods, Stone=6/3*2=4 stones and Metal=(6+4)/5*1=2 metal.
6:4:2 or 3:2:1

Player has
wood=18*2/3=12 woods
Stones=18
Metal=18*1/2=9 metal
Ratio 12:18:9

Maximum castel:
So we need min 6 stones we have total 18 stones which is the Highest restriction so, we can develop 3 maximum castels.

Maximum Mansion:
we need most wood for mansion and we have 12 units of wood, So we can develop at max 4 mansions.

Answer:
Max castel=3
Max Mansion=4

Bunuel
 


This question was provided by GMAT Club
for the GMAT Club Olympics Competition

Win over $30,000 in prizes such as Courses, Tests, Private Tutoring, and more

 



In the computer game Stoneforge Dominion, a player can use available resources to build castles and mansions. Each structure must be built using a specific ratio of three components: stone, wood, and metal.

  • A castle requires 2 units of wood, along with three times as much stone as wood, and twice as much wood as metal.
  • A mansion requires 6 units of wood, along with 2 units of stone for every 3 units of wood, and 1 unit of metal for every 5 units of total wood and stone combined.

The player has 18 units of stone, along with two-thirds as much wood and half as much metal as stone.

Select for Castle the maximum number of complete castles the player can build, and select for Mansion the maximum number of complete mansions the player can build, using the available resources. Make only two selections, one in each column.
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Given:
Available Resources
ResourceQuantity
Stone18
Wood12
Metal9


Castle Requirements (Per Castle)
ResourceRequired per castle Max castles possible
Stone618 ÷ 6 = 3
Wood212 ÷ 2 = 6
Metal19 ÷ 1 = 9
Limiting Factor → Stone→ Max Castles = 3

Mansion Requirements (Per Mansion)
ResourceRequired per mansion Max mansions possible
Wood612 ÷ 6 = 2
Stone(2/3 × 6) = 418 ÷ 4 = 4.5
Metal(1/5 × (6+4)) = 29 ÷ 2 = 4.5
Limiting Factor → Wood→ Max Mansions = 2

Answer-
StructureMaximum Buildable
Castle 3
Mansion 2
So, the correct option are 3 and 2 for the Ist and IInd coulmn respectively.
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Can someone please explain how to convert phrases like this into numbers or equations? I get very confused with phrases like "3 times as much stone as wood, and thrice as much wood as metal".
For example, for the statement "2 units of stone for every 3 units of wood", I made the equation as 2S = 3W, hence it became S = 3W/2, which is wrong. Can someone please explain how to properly map out the requirements for castle and mansion in a step-by-step way? I appreciate the help on this.
Bunuel
Bunuel
In the computer game Stoneforge Dominion, a player can use available resources to build castles and mansions. Each structure must be built using a specific ratio of three components: stone, wood, and metal.

  • A castle requires 2 units of wood, along with three times as much stone as wood, and twice as much wood as metal.
  • A mansion requires 6 units of wood, along with 2 units of stone for every 3 units of wood, and 1 unit of metal for every 5 units of total wood and stone combined.

The player has 18 units of stone, along with two-thirds as much wood and half as much metal as stone.

Select for Castle the maximum number of complete castles the player can build, and select for Mansion the maximum number of complete mansions the player can build, using the available resources. Make only two selections, one in each column.

­

GMAT Club Official Explanation:



Available resources:

Stone = 18 units
Wood = 12 units (two-thirds of 18)
Metal = 9 units (half of 18)

Castle requirements:

Wood = 2 units
Stone = 3 * 2 = 6 units
Metal = 2/2 = 1 unit

Total per castle: 6 stone, 2 wood, 1 metal

Maximum castles:
Stone: 18/6 = 3
Wood: 12/2 = 6
Metal: 9/1 = 9

Limiting factor: stone
Maximum castles = 3

Mansion requirements per unit:

Wood = 6 units
Stone = 2/3 * 6 = 4 units

Total wood + stone = 6 + 4 = 10
Metal = 10/5 = 2 units

Total per mansion: 4 stone, 6 wood, 2 metal

Maximum mansions:
Stone: 18/4 = 4.5
Wood: 12/6 = 2
Metal: 9/2 = 4.5

Limiting factor: wood
Maximum mansions = 2
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1. “N times as much A as B
  • Given: “three times as much stone as wood.”
  • Let S = stone, W = wood.
S = 3 × W

Because you have three times as many units of stone as you have units of wood.

2. “Y units of A for every Z units of B
  • Given: “2 units of stone for every 3 units of wood.”
  • Let S = stone, W = wood.
S : W = 2 : 3
S / W = 2/3
S = (2/3) × W.

(You had written 2S = 3W, which would say S/W = 3/2)
Now we can apply these formulas

Castle requirements
Quote:
“A castle requires 2 units of wood, along with three times as much stone as wood, and twice as much wood as metal.”
  1. Wood requirement
    • W = 2.
  2. “Three times as much stone as wood.”
    • Stone S = 3 × W = 3 × 2 = 6.
  3. “Twice as much wood as metal.”
    • W = 2 × M
      M = W / 2 = 2 / 2 = 1.
Summary per castle:
  • Stone = 6
  • Wood = 2
  • Metal = 1

Mansion requirements
Quote:
“A mansion requires 6 units of wood, along with 2 units of stone for every 3 units of wood, and 1 unit of metal for every 5 units of total wood and stone combined.”
  1. Wood requirement
    • W = 6.
  2. “2 units of stone for every 3 units of wood.”
    • S / W = 2/3
      S = (2/3) × 6 = 4.
  3. Compute total wood + stone
    • W + S = 6 + 4 = 10.
  4. “1 unit of metal for every 5 units of total wood and stone.”
    • M / (W + S) = 1/5
      M = (1/5) × 10 = 2.
Summary per mansion:
  • Stone = 4
  • Wood = 6
  • Metal = 2

Available resources
  • Stone = 18
  • Wood = (2/3) of 18 = 12
  • Metal = (1/2) of 18 = 9


sahilsehdev97
Can someone please explain how to convert phrases like this into numbers or equations? I get very confused with phrases like "3 times as much stone as wood, and thrice as much wood as metal".
For example, for the statement "2 units of stone for every 3 units of wood", I made the equation as 2S = 3W, hence it became S = 3W/2, which is wrong. Can someone please explain how to properly map out the requirements for castle and mansion in a step-by-step way? I appreciate the help on this.
Bunuel
Bunuel
In the computer game Stoneforge Dominion, a player can use available resources to build castles and mansions. Each structure must be built using a specific ratio of three components: stone, wood, and metal.

  • A castle requires 2 units of wood, along with three times as much stone as wood, and twice as much wood as metal.
  • A mansion requires 6 units of wood, along with 2 units of stone for every 3 units of wood, and 1 unit of metal for every 5 units of total wood and stone combined.

The player has 18 units of stone, along with two-thirds as much wood and half as much metal as stone.

Select for Castle the maximum number of complete castles the player can build, and select for Mansion the maximum number of complete mansions the player can build, using the available resources. Make only two selections, one in each column.

­

GMAT Club Official Explanation:



Available resources:

Stone = 18 units
Wood = 12 units (two-thirds of 18)
Metal = 9 units (half of 18)

Castle requirements:

Wood = 2 units
Stone = 3 * 2 = 6 units
Metal = 2/2 = 1 unit

Total per castle: 6 stone, 2 wood, 1 metal

Maximum castles:
Stone: 18/6 = 3
Wood: 12/2 = 6
Metal: 9/1 = 9

Limiting factor: stone
Maximum castles = 3

Mansion requirements per unit:

Wood = 6 units
Stone = 2/3 * 6 = 4 units

Total wood + stone = 6 + 4 = 10
Metal = 10/5 = 2 units

Total per mansion: 4 stone, 6 wood, 2 metal

Maximum mansions:
Stone: 18/4 = 4.5
Wood: 12/6 = 2
Metal: 9/2 = 4.5

Limiting factor: wood
Maximum mansions = 2
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