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net/~stepanov/mnemo/mnemoare.html Tricks and techniques] *[https://worldmentalcalculation.com/2020/08/16/mso-2020-mental-calculations-online-results/ MSO Results]...

for Competitive and Advanced Mental Calculation |url=https://worldmentalcalculation.com/ |access-date=2025-04-16 |language=en-US}}</ref><ref name=":0"...

together in 1 minute and 45 seconds.<ref>{{Cite web|url=https://worldmentalcalculation.com/2022/07/19/mental-calculation-world-cup-2022-results/|title=Mental...