Gịnị bụ aha maka ngwaa mgbe onye na-eme ihe nkiri gbanwere ọrụ n'egwuregwu ma ọ bụ mmepụta? N'iburu ajụjụ nke mbụ n'uche, dee ihe gbara ya gburugburu bụ́ nke ga-enye azịza ya. Ọ nwere ike ịbụ 1 - 20 ahịrịokwu. Ihe ndị gbara ya gburugburu:
Ọ bụ ihe na-adọrọ adọrọ na-eche na echiche nke ọrụ nsogbu bụ nnọọ ọgaranya karịa echiche nke mkpebi nsogbu. Otú ọ dị, nke a abụghị n'ezie ikpe, ebe ọ bụ na ọrụ nsogbu nwere ike recast dị ka mkpebi nsogbu. Dịka ọmụmaatụ, enwere ike igosipụta ịba ụba nke ọnụọgụ abụọ dị ka nchịkọta nke atọ (a, b, c) dị ka mmekọrịta a × b = c. Ikpebi ma otu triple e nyere bụ onye so n'ìgwè a kwekọrọ n'idozi nsogbu nke ịba ụba nke nọmba abụọ.