Vault Breakers: a place value and rounding game for the 11+

About Vault Breakers

Vault Breakers turns 11+ number skills into a bank heist. A heist is four vaults (Bronze, Silver, Gold and Diamond) with four tumblers each, and every tumbler is one question on place value, rounding, negative numbers, Roman numerals or multiplying and dividing by 10, 100 and 1000. Each vault leans on different topics, and every heist covers all five.

The last tumbler in each vault is a time-lock: a harder question against a countdown ring, for double haul. Right answers add gold bars to the haul and raise a stealth meter, quick answers most of all, and the stealth meter sets the rank: Apprentice, Safecracker or Mastermind. Questions get harder after a streak and easier after misses, and the heist review explains every trap that set off the alarm.

How to play Vault Breakers

1. Choose a starting level (Apprentice, Specialist or Mastermind) and press Start the heist.
2. Tap the right answer to crack each tumbler; a quick answer is a silent crack with a bigger haul.
3. Get three right in a row to become Master cracker and double your haul until a miss.
4. Beat the time-lock at the end of each vault: a harder question for double haul.
5. Read the heist review to learn how each trap works, then plan another heist.

What it practises for the 11+

Place Value

Questions ask children to read and write large numbers in words and figures, partition them, and compare and order numbers, decimals included. It builds a sure sense of what each digit is worth, e.g. in 4,072,500 the 7 is worth 70,000. Learn the topic →

Rounding

Questions ask children to round to the nearest 10, 100, 1000, whole number or decimal place, to estimate, and to round sensibly in real-life problems. It builds care with the deciding digit, e.g. 4,650 to the nearest 100 is 4,700. Learn the topic →

Negative Numbers

Questions use temperatures, lifts and number lines to order numbers below zero, count through zero and find differences. It builds confidence crossing zero, e.g. a rise from −3°C to 5°C is 8 degrees. Learn the topic →

Roman Numerals

Questions ask children to read and write Roman numerals, including years and clock faces, and to spot numerals written the wrong way. It builds the rule for the subtracting pairs, e.g. IV is 4, XL is 40 and CM is 900. Learn the topic →

× and ÷ by 10, 100 and 1000

Questions ask children to multiply and divide whole numbers and decimals by 10, 100 and 1000, convert units and change pence into pounds. It builds the idea that the digits move places while the point stays put, e.g. 3.6 × 100 = 360. Learn the topic →

Try Vault Breakers questions

Questions from the game, for you to try together. Have a go before opening the answer.

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