Four Make 999

Choose four different numbers from the table and add them up.

 338 290 390 231 283 218 326 339 278 274 213 282 325 226 170 277

How many different ways are there of making 999?

[Note to teacher: Click on the numbers above to select them. Correct solutions will be recorded above
but the application does not check for repeats or the same numbers added in a different order.

Topics: Starter | Arithmetic

• Rebecca Laura Holly Amy Georgia Tyler & Kieran, Whitby High, Ellesmere Port
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• More Solutions from Whitby Technology College:

235 + 280 + 212 + 272 = 999
280 + 280 + 227 + 212 = 999
272 + 272 + 227 + 228 = 999
•
• Jasmine in my maths class found 363 + 363 + 273 = 999. Well done!
• Belvedere Academy Liverpool, Year 7 Set 3
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• 271 + 280 + 291 + 157 (Yasmine)
265 + 275 + 291 + 168 (Demi)
We had more but did not have time to put them on.
• Lauren Livingstone, Holyrood Secondary
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• Mrs Boussouara's maths class found this difficult. Although it made us think about numbers and got our brains working.
• Holyrood Secondary, Glasgow
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• Mrs Boussouara's Maths class thought this was tricky. We liked doing this .we got it in the end.
• S2, JPA Glasgow
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• 263+255+311+170
380+170+194+255
436+194+199+170
375+170+255+199
372+170+194+263.
• Kiefer Kids, Cottage Hill In California
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• Tougher than we thought!
466+195+152+186=999
152+383+278+186=999
162+259+195+383=999
393+152+195+259=999.
• Primary 7, Meethill Primary Peterhead
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• We managed to get 6 different combinations. Our STAR pupils were Patrick and Jamie. We showed good perseverance throughout this challenge.
• Transum,
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• Thanks everyone for your comments. Good to hear that this Starter is providing a suitable challenge. Please note that each time this page is loaded a different of numbers appears in the grid above ... just in case you were wondering why the answers mentioned in the comments above do not work for you! Answers are provided below for Transum subscribers.
• Nic, Glen Eden Intermediate
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• 255+348+158+238.
• David, Thailand
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• We got nine boys!
• Amy C, Coorara Primary School
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• In our class I was the first to find a solution.
448+241+151+159=999.

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.

Previous Day | This starter is for 24 August | Next Day

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.

Try "Three Make 1000", it's a little easier!

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 Teacher, do your students have access to computers such as tablets, iPads or Laptops?  This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments: Transum.org/go/?Start=August24 However it would be better to assign one of the student interactive activities below.

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