Brain N-Back(Numbers)

Umdlalo omuhle kakhulu wobuchopho!
ngekhanda i-oda lezinombolo!
Dlala noma ngubani wanoma yimuphi unyaka.
Uzosiza ukuthuthukisa inkumbulo yakho namakhono okuhlushwa. -up!
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{2 emuva, 3 emuva, 4 emuva, 4 emuva, 5 emuva,
ukulinganisa isikhathi sokubonisa.
Ukukhetha izinombolo zokubonisa kusuka ku-2 kuye ku-5.
Ukukhetha inani lemidlalo okufanele lidlalwe. {# #} mode emnyama.