SPACE ACADEMY · TRY, THINK, PLAY

Class 2: Codes and patterns

Use repeating groups, internal gaps and picture rules; older grades also separate linked number rules.

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Try a quick challenge

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

ExplorePosition and order

How many boats are to the left of the encircled boat?

DPCTL
  1. 2
  2. 1
  3. 4
  4. 3
Need a hint?

Do not count the encircled boat itself. Count only the boats before it.

Answer & method
Answer A: 2

The encircled boat is 3rd from the left. The number of boats before it is 3 - 1 = 2.

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ReasonNumber patterns

The IN number enters the rule machine. What number comes OUT at '?'?

IN9RULE MACHINEx 5 then + 3OUT?
  1. 60
  2. 53
  3. 48
  4. 45
Need a hint?

Apply the first part of the rule to the IN number, then apply the second part to that result.

Answer & method
Answer C: 48

Start with 9, multiply by 5 to get 45, then add 3 to get 48.

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StretchVisual reasoning

Which badge fits the '?' at row 3, column 3 of the 3 by 3 badge grid?

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

Check across the row to find the outer shape, then check down the column to find the inner mark.

Answer & method
Answer A: Picture A

Across row 3 every badge has a square shape, and down column 3 every badge has a ring, giving a square with a ring.

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For grown-ups

Ideas to practise

  • Place value. A digit has a different value in each position. Count the places from the right.
  • Position and order. Use the given left-to-right order, then count or locate a neighbour.
  • Shapes and their properties. Count straight sides and corners carefully. A curved edge is not a straight side.
  • Solids and nets. Follow which faces meet when folded. A face touching another in the net cannot be opposite it.
  • Repeating patterns. Find the smallest repeating group and continue that group.
  • Calendars. Read the weekday headings. A week has seven days; count intervals, not both endpoints.
  • Number patterns. Look for the same change between neighbouring numbers.
  • Sorting by a rule. Check which object does not share the named property.
  • Coding and decoding. Apply the stated code consistently to each letter.
  • Possible combinations. Match each choice in the first group with every allowed choice in the second.
  • Visual reasoning. Track the position, orientation and markings, not just the outline. Check every part of a picture.

A game mission has 8 untimed questions. Only the game saves choices and hints. A finished mission earns one launch charge and participation towards the Right solar panel in Outer Planet Voyager. The chapter goal is 8 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.

  • Turn hundreds, tens and ones words into a number
  • Find a place in a row from the left or right
  • Count shapes and lines in a picture
  • Choose the object that can roll or slide
  • Pick the next or missing badge in a pattern
  • Count days and months from a named day
  • Fill the missing term in a number series
  • Pick the odd one out of numbers, letters or words
  • Find a boat position in a row from either side
  • Count seats round a circle
Play Explore

Reason

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

  • Count tiles in the next step of a growing figure
  • Find a place in a row from the left or right
  • Count shapes and lines in a picture
  • Choose the object that can roll or slide
  • Match a pair using the same link
  • Find the number that fits every clue
  • Make the greatest, smallest or count numbers from digit cards
  • Pick the odd one out of numbers, letters or words
  • Follow a number machine rule
  • Tell cardinal numbers from ordinal numbers
Play Reason

Stretch

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

  • Continue a skip-counting mission log
  • Find a place in a row from the left or right
  • Count shapes and lines in a picture
  • Find a missing letter or count letters in the alphabet
  • Match a pair using the same link
  • Find the number that fits every clue
  • Make the greatest, smallest or count numbers from digit cards
  • Use trees and gaps along a road
  • Complete a 3 by 3 picture matrix
  • Follow a number machine rule
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

The grade topics use SOF IMO Class 2 published topic syllabus as their primary reference. The SOF sample and CREST previous-year paper below informed representations and reasoning demands. Providers have different topic boundaries; their syllabi are not interchangeable.

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.