SPACE ACADEMY · TRY, THINK, PLAY

PP1: More or fewer?

Compare actual quantities, including what remains after a change.

Play missionChapters

Try a quick challenge

Just a quick try. Not saved; no game rewards.

ExploreComparing quantities

Which one is the thickest tube?

RPQ
  1. P
  2. R
  3. Q
Need a hint?

Thick means wide. Find the widest one.

Answer & method
Answer B: R

From thinnest to thickest: Q, P, R. So R is the thickest.

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ReasonComparing quantities

Count both groups. Are there more moon coins or moon rocks?

  1. Moon rocks
  2. Same number
  3. Moon coins
Need a hint?

Count each group. The bigger number is more.

Answer & method
Answer C: Moon coins

You see 7 moon coins and 5 moon rocks. Moon coins are more.

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StretchComparing quantities

Which tower is the tallest?

  1. Picture A
  2. Picture B
  3. Picture C
Need a hint?

Look at how high each tower goes.

Answer & method
Answer A: Picture A

That tower is the tallest.

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For grown-ups

Ideas to practise

  • Comparing quantities. Compare the values, not the size or spacing of their pictures.

A game mission has 5 untimed questions. Only the game saves choices and hints. A finished mission earns one launch charge and participation towards the Moon cap in Moon Camp. The chapter goal is 5 different questions in finished sets; hints and wrong answers count as participation, not mastery. Some craft systems link more than one chapter.

Choose a level

Explore

Foundations: read a representation and practise the underlying idea.

  • Which tray has more or fewer
  • Most, fewest, tallest, longest and biggest
  • Thickest and thinnest
  • Heavier or lighter on the see-saw
  • Which card has the same number
  • Bigger and smaller numbers
Play Explore

Reason

Paper-style reasoning: connect clues, interpret a diagram or work backwards.

  • Which tray has more or fewer
  • Most, fewest, tallest, longest and biggest
  • Heavier or lighter on the see-saw
  • How many more make the rows equal
  • Which card has the same number
  • Thickest and thinnest
Play Reason

Stretch

Higher-order practice: link conditions, test statements and avoid a tempting wrong method.

  • Which tray has more or fewer
  • How many more make the rows equal
  • Heavier or lighter on the see-saw
  • Most, fewest, tallest, longest and biggest
  • Jars with more, less or the same water
  • Thickest and thinnest
  • Bigger and smaller numbers
Play Stretch

Levels change representations, clues and conditions, not just the numbers. These are practice formats, not validated exam-equivalent difficulty.

Using the feedback

Learning reports distinguish hinted answers from independent first choices. They consider up to 20 recent different, unhinted questions per skill and level, and wait for at least five before suggesting extra practice. Repeating the same question does not add evidence. Reports are practice evidence, not IQ scores, diagnoses, ranks or predictions of competition results.

Ask the learner to explain a drawing or check with objects too. Choose Explore or an earlier chapter when a step feels too large.

Sources & limits

PP1 and PP2 are Otterly pre-primary readiness activities, not official SOF IMO levels or formal Olympiad papers. The CREST KG sample informed picture-led activities; it does not establish an equivalent school level.

Questions, diagrams, picture choices, hints and explanations are original Otterly work, not copied paper questions or publisher artwork. No Olympiad provider is affiliated with or endorses Space Academy. This is not complete exam preparation; follow classroom teaching and check the current official syllabus too. Independent educator review is still needed for difficulty and breadth.

Content and coverage notes. To report a confusing question, describe the grade, chapter, level and question on the contact page. Do not send children’s personal information.

Private, local saves

Game progress stays only in this browser, in three anonymous explorer slots. Clearing site data or closing a private session may remove it. Download a private backup from Help & saves; there is no cloud sync. The game checks saves before play and stops on save failures rather than pretending progress was saved.

These page examples never change a saved game. Game links carry question settings, not a learner’s answers. There are no names, school details, public profiles, chat, analytics or advertising SDKs in the game. Grown-up guidance · Privacy

Original Otterly practice, not an official exam. Game progress stays on this browser.