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• Class 1D, Linwood High School Renfrewshire
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• Class 1 found 8 different ways. 597 + 234 + 168, 534 + 286 + 179, 186 + 274 + 539, 189 + 247 + 563, 452 + 378 + 169, 179 + 368 + 452, 536 + 274 + 189, 134 + 276 + 589
• Jon Brian, British School of Bucharest
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• Inspired by those who found 8 correct answers, 5B from the British School of Bucharest found 10!
Thanks for the stimulus!
• Rhonda, Rocky Mtns
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• Excellent exercise.
• Laverne, China
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• WOW this exercie blew my mind!!! My year 2 class found 137 different solutions ;).
• Shamelddon, London,UK
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• This is the best website that I've ever come across,it is very educational,engaging and amazingly interesting.It can engage all age;old or young.Well done.
• Jackie,
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• This really made me think thanks.
• Celeste McKenzie, CT
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• This is a great exercise. I have a variation: Using the numbers 1-9 only once each, make a true addition sentence where 2 3-digit numbers add up to a third 3-digit number.
• Carol, London
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• Brilliant exercise.
• Year 6 Class, Santa Clara Primary School - Western Australia
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• We got a new record, we were able to achieve 14 different solutions, not using numbers swapped around.
• Gemma Robinson, Leicestershire
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• Very good exercise that gets your brain thinking.
• Joshua Iyobhebhe, Bishop High
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• I loved this starter my favourite one so far this is the best website ever the kids always get exited when I put a starter up on the board.
• Mr G, Western Australia, Australia
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• Our man Lachie finished this Mathematical calculation in under one minute..........With an awesome haircut too!
• Mr Webber, Pencoed School
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• 7/1 thought this was great!
• Ibrahim, Byron Court Primary, Middlesex
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• I got 597,138,264. Took a bit of trail and error.
• Mandy,
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• Incredible! My class found 97 solutions!
• Mrs Maclean, St Andrews RC High School
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• This is a great starter activity! Not only did my S2 class calculate many different soltions they calculated exactly how many different solutions are possible. They loved the challenge!
• Sycamore Class, West Borough Primary School
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• A supreme game! The girls were much quicker than the boys. We found ten solutions before starting our day!
• Mariz, Agutaya Palawan
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• Excellent exercise!!!
• D Brunner, Ilfracombe
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• There are actually only 5 solutions with all others being a permutation of the digits in the columns.
Hundreds column can only be digits 125 or 134 (any arrangement)
If 125 then tens column can only be 369, 378 or 648, with remaining digits in the units column.
If 134 then tens column can only be 279 or 567 with remaining digits as units.
These correct columns can be arranged in 6 different ways each giving 6x6x6=216 combinations x 5 solution sets = 1080 possible.
• Logi, Ghana And Ireland And England
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• I found one which is 479+368+152 lucky guess.
• , Vp
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• I quite liked this one.
• Mr. Keir, Welshpool
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• Very competitive in Welshpool High School. Year 7 set 2 loved it!
• Miss Smith, Cults Primary
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• Think we broke the record and managed to get 13 different solutions. GO US!

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