Okuqukethwe
Kule ncwadi, sizocabangela izimpawu zokuhlukaniswa ngezinombolo ukusuka ku-2 kuya ku-11, ezihambisana nazo nezibonelo zokuqonda kangcono.
Isitifiketi sokuhlukaniswa - lena i-algorithm, usebenzisa ongakwazi ukunquma ngokushesha ukuthi inombolo ecatshangelwayo iyimpinda yaleyo enqunywe kusengaphambili (okungukuthi, ukuthi ihlukaniseka ngayo ngaphandle kwensalela).
Uphawu lokuhlukana ku-2
Inombolo ihlukaniseka ngo-2 uma futhi kuphela uma idijithi yayo yokugcina ilingana, okungukuthi ihlukaniswa kabili.
izibonelo:
- 4, 32, 50, 112, 2174 - izinombolo zokugcina zalezi zinombolo zilingana, okusho ukuthi zihlukaniswa ngo-2.
- 5, 11, 37, 53, 123, 1071 - azihlukaniseki ngo-2, ngoba izinombolo zabo zokugcina ziyinqaba.
Uphawu lokuhlukana ku-3
Inombolo ihlukaniseka ngo-3 uma kuphela isamba sawo wonke amadijithi ayo futhi ihlukaniswa ngo-XNUMX.
izibonelo:
- 18 - ihlukaniswa ngo-3, ngoba. 1+8=9, futhi inombolo 9 ihlukaniswa ngo-3 (9:3=3).
- 132 - ihlukaniswa ngo-3, ngoba. 1+3+2=6 kanye no-6:3=2.
- 614 akayona impinda ka-3, ngoba 6+1+4=11, futhi 11 akahlukaniseki ngokulinganayo ngo-3.
(11:3 = 3.)2/3).
Uphawu lokuhlukana ku-4
inombolo enamadijithi amabili
Inombolo ihlukaniswa ngo-4 uma futhi kuphela uma isamba sedijithi ephindwe kabili endaweni yayo yamashumi kanye nedijithi endaweni eyodwa nayo ihlukaniswa ngezine.
izibonelo:
- 64 - ihlukaniswa ngo-4, ngoba. 6⋅2+4=16 kanye no-16:4=4.
- 35 akahlukaniseki ngo-4, ngoba 3⋅2+5=11, kanye
11:4 2 =3/4 .
Inombolo yamadijithi angaphezu kuka-2
Inombolo iyimpinda ka-4 lapho amadijithi ayo amabili okugcina enza inombolo ehlukaniseka ngezine.
izibonelo:
- 344 - ihlukaniswa ngo-4, ngoba. U-44 uwukuphindaphinda koku-4 (ngokwe-algorithm engenhla: 4⋅2+4=12, 12:4=3).
- 5219 akayona impinda ka-4, ngoba u-19 akahlukaniseki ngo-4.
Qaphela:
Inombolo ihlukaniseka ngo-4 ngaphandle kwensalela uma:
- kwidijithi yayo yokugcina izinombolo 0, 4 noma 8, futhi idijithi engaphambili ilingana;
- enombolweni yokugcina - 2 noma 6, kanti kweliphenathi - izinombolo eziyinqaba.
Uphawu lokuhlukana ku-5
Inombolo ihlukaniseka ngo-5 uma futhi kuphela uma idijithi yayo yokugcina ingu-0 noma u-5.
izibonelo:
- 10, 65, 125, 300, 3480 - ihlukaniswa ngo-5, ngoba igcina ngo-0 noma 5.
- 13, 67, 108, 649, 16793 - azihlukaniseki ngo-5, ngoba izinombolo zabo zokugcina aziwona u-0 noma u-5.
Uphawu lokuhlukana ku-6
Inombolo ihlukaniseka ngo-6 uma futhi kuphela uma iyimpindwa yakho kokubili okubili nokuthathu ngesikhathi esisodwa (bheka izimpawu ezingenhla).
izibonelo:
- 486 - ihlukaniswa ngo-6, ngoba. ihlukaniswa ngo-2 (idijithi yokugcina ka-6 ilinganayo) futhi ngo-3 (4+8+6=18, 18:3=6).
- 712 - ayihlukaniseki ngo-6, ngoba iyimpinda ka-2 kuphela.
- 1345 - ayihlukaniseki ngo-6, ngoba akuyona impinda ka-2 noma u-3.
Uphawu lokuhlukana ku-7
Inombolo ihlukaniseka ngo-7 uma futhi kuphela uma isamba esiphindwe kathathu amashumi ayo kanye namadijithi endaweni eyodwa nakho kuhlukaniswa ngesikhombisa.
izibonelo:
- 91 - ihlukaniswa ngo-7, ngoba. 9⋅3+1=28 kanye no-28:7=4.
- 105 - ihlukaniswa ngo-7, ngoba. 10⋅3+5=35, kanye no-35:7=5 (enombolweni 105 kukhona amashumi ayishumi).
- 812 ihlukaniseka ngo-7. Lapha iketango elilandelayo lithi: 81⋅3+2=245, 24⋅3+5=77, 7⋅3+7=28, kanye no-28:7=4.
- 302 – akuhlukaniseki ngo-7, ngoba 30⋅3+2=92, 9⋅3+2=29, kanye no-29 akahlukaniseki ngo-7.
Uphawu lokuhlukana ku-8
inombolo yamadijithi amathathu
Inombolo ihlukaniswa ngo-8 uma futhi kuphela uma isamba sedijithi endaweni eyodwa, idijithi ephindwe kabili endaweni yamashumi, futhi idijithi ephindwe kane endaweni yamakhulu ihlukaniswa ngesishiyagalombili.
izibonelo:
- 264 - ihlukaniswa ngo-8, ngoba. 2⋅4+6⋅2+4=24 kanye no-24:8=3.
- 716 – 8 ayihlukaniseki, ngoba 7⋅4+1⋅2+6=36, futhi
36:8 4 =1/2 .
Inombolo yamadijithi angaphezu kuka-3
Inombolo ihlukaniseka ngo-8 lapho amadijithi amathathu okugcina enza inombolo ehlukaniseka ngo-8.
izibonelo:
- 2336 - ihlukaniseka ngo-8, ngoba u-336 uyi-multiple ka-8.
- 12547 akuyona impinda ka-8, ngoba u-547 akahlukaniseki ngokulinganayo ngesishiyagalombili.
Uphawu lokuhlukana ku-9
Inombolo ihlukaniseka ngo-9 uma futhi kuphela uma isamba sawo wonke amadijithi ayo futhi ihlukaniswa ngesishiyagalolunye.
izibonelo:
- 324 - ihlukaniswa ngo-9, ngoba. 3+2+4=9 kanye no-9:9=1.
- 921 – ayihlukaniseki ngo-9, ngoba 9+2+1=12 kanye
12:9 1 =1/3.
Uphawu lokuhlukana ku-10
Inombolo ihlukaniseka ngo-10 uma futhi kuphela uma igcina ngoziro.
izibonelo:
- 10, 110, 1500, 12760 iziphindaphinda zika-10, idijithi yokugcina ngu-0.
- 53, 117, 1254, 2763 azihlukaniseki ngo-10.
Uphawu lokuhlukana ku-11
Inombolo ihlukaniseka ngo-11 uma futhi kuphela uma umehluko phakathi kwezibalo zezinombolo ezilinganayo neziyinqaba unguziro noma uhlukaniseka ngeshumi nanye.
izibonelo:
- 737 - ihlukaniswa ngo-11, ngoba. |(7+7)-3|=11, 11:11=1.
- 1364 – ihlukaniseka ngo-11, ngoba |(1+6)-(3+4)|=0.
- 24587 akahlukaniseki ngo-11 ngoba |(2+5+7)-(4+8)|=2 kanye no-2 akahlukaniseki ngo-11.