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If today is Friday, what day of the week was it 27 days ago?
Mathematics
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2 stepsSwali:
Ikiwa leo ni Ijumaa, ilikuwa siku gani ya wiki siku 27 zilizopita?
Tafuta salio la kugawanya idadi ya siku kwa 7 (idadi ya siku katika wiki).
Tunataka kujua ni siku gani ilikuwa siku 27 zilizopita. Kwa kuwa kuna siku 7 katika wiki, mzunguko wa siku hurudia kila baada ya siku 7.
Hii inamaanisha siku 27 zilizopita ni sawa na wiki 3 kamili na siku 6 za ziada.
Hesabu kurudi nyuma siku 6 kutoka Ijumaa.
Kama leo ni Ijumaa, tunahitaji kurudi nyuma siku 6.
- Ijumaa - siku 1 = Alhamisi
- Ijumaa - siku 2 = Jumatano
- Ijumaa - siku 3 = Jumanne
- Ijumaa - siku 4 = Jumatatu
- Ijumaa - siku 5 = Jumapili
- Ijumaa - siku 6 = Jumamosi
Njia nyingine ni kusonga mbele siku 1, kwa sababu kurudi nyuma siku 6 ni sawa na kusonga mbele siku .
- Ijumaa + siku 1 = Jumamosi
Kwa hivyo, siku 27 zilizopita ilikuwa .
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