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If today is Friday, what day of the week was it 27 days ago?

Mathematics

ScanSolve AI Answer

Answer

Jumamosi\text{Jumamosi}

Step-by-step solution

2 steps

Swali:
Ikiwa leo ni Ijumaa, ilikuwa siku gani ya wiki siku 27 zilizopita?

  1. 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.

    27÷7=3 na salio la 627 \div 7 = 3 \text{ na salio la } 6

    Hii inamaanisha siku 27 zilizopita ni sawa na wiki 3 kamili na siku 6 za ziada.

  2. 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 7−6=17 - 6 = 1.

    • Ijumaa + siku 1 = Jumamosi

    Kwa hivyo, siku 27 zilizopita ilikuwa Jumamosi\boxed{\text{Jumamosi}}.

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