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Problem 12 · The Ironclad’s Hidden Rest SitePrint one blank worksheet now, download its PDF, or prepare a family or classroom packet.

Problem 12

The Ironclad’s Hidden Rest Site

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The Ironclad’s Hidden Rest Site

Complete to collectBrilliant-Cut ZirconLevel 4 · 5 Glints

In Slay the Spire, the Ironclad marks three different Spire rooms on whole-number floors. From lower to higher, they are the Monster, Rest Site, and Treasure. The Rest Site is the same distance from each outside room. The Monster’s hidden floor number and the Treasure’s hidden floor number add to 68.

Ironclad’s route winds upward toward a hidden Rest Site.

Map of the hidden floors

Room order is shown · Floor numbers are hidden

Three equally spaced rooms on a number line Monster, Rest Site, and Treasure are shown from left to right at equally spaced points. Each gap is labeled same jump. The hidden Monster floor plus the hidden Treasure floor equals 68. OUTSIDE FLOORS ? + ? = 68 SAME JUMP SAME JUMP Monster Rest Site Treasure LOWER BETWEEN HIGHER REST SITE FLOOR: ______

Your challenge

What floor is the Rest Site on? Explain why its floor is forced even though the two outside floor numbers and the jump size are hidden.

Write the Rest Site floor on the number line. Use separate paper for your equation and explanation.

At a glance

About this problem

These tags show what the problem is about and the math you’ll use. Choose one to find similar problems.

Theme

Skills

Helpful first

Grade

Math area

Topics

Is this a good fit?

Before you choose this problem

A plain-language look at readiness, thinking, time, and the expected response.

Math readiness

Designed for Grade 2

Uses Middle Grade 2 math.

Thinking

Insight challenge

A hidden structural insight is needed to unlock the problem.

Time & response

About 6–15 minutes

Light amount of written work · Short Explanation response.

How to support: Ask what stays fixed when the two surrounding room numbers are hidden but their sum is known.

How did it feel?

Pick the option that best matches this challenge. Recommendations use topic, math area, grade, story, and thinking challenge.

Keep exploring

Slay the Spire challenge 4 of 4

Technical reference

Rating, skills & curriculum

Designed for Grade 2 · Uses Middle Grade 2 math · About 6–15 minutes

Grade 2 · Number and quantity · Operations and computation · Place value and numeration · Multiplication and division

MJ 2.6 · C4 · W1

Precise MJD coordinates, factor scores, skill weights, calibration evidence, and curriculum crosswalks. This reference is available to everyone and is intentionally last.

Content level

MJ 2.6

Grades K–2

Grade 2 progression · point 6

Likely range
MJ 2.4–2.8
Confidence
91%

Challenge

C4 · Insight

A hidden structural insight is needed to unlock the problem.

  • Method selection3
  • Reasoning depth2
  • Novelty3
  • Constraint management2
  • Proof or justification3

Workload

W1 · Light

A short response with only a few steps.

Active time
6–15 minutes · typically 10
Response
Short Explanation
Known-method steps
4
  • Mechanical execution1
  • Written output1
  • Representation production1
  • Bookkeeping0

Learning focus

Skills this problem practices

What a successful response demonstrates, with each skill’s share of the content rating.

  • Represent whole numbers, sums, and differences within 100 on a number line

    The learner can represent whole numbers, sums, and differences within 100 on a number line. This capability is distinct from mere exposure to or isolated use of count sequence; add/sub.

    • Independent mastery
    • 60% focus
    • MJ 2.4 milestone

  • Double and halve whole-number quantities

    The learner can double and halve whole-number quantities. The capability is credited only when the task makes that demand necessary for success.

    • Independent mastery
    • 40% focus
    • MJ 2.6 milestone

Readiness

Helpful prerequisites

Skills the rating assumes are already available to the learner.

  • Solve one- and two-step addition/subtraction stories within 100

    The learner can solve one- and two-step addition/subtraction stories within 100. This capability is distinct from mere exposure to or isolated use of Grade 1 story structures.

    • Developing readiness
    • Required
    • MJ 2.2 milestone

External alignment

Curriculum and standards crosswalks

Approved evidence-backed locations that support discovery. They do not define the MathJewels rating.

Bridges in Mathematicsthird-edition · 10 locations
Modules4 locations · Representative: Module 3: Adding & Subtracting on the Number Line
Number Corner workouts6 locations · Representative: September: Computational Fluency
Common Core State Standards for Mathematics2010 · 2 locations
Standards1 location · Representative: Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.
Practice locations1 location · Representative: Look for and make use of structure.