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Question-149595




Question Number 149595 by SLVR last updated on 06/Aug/21
Commented by SLVR last updated on 06/Aug/21
sir solution please..
$${sir}\:{solution}\:{please}.. \\ $$
Answered by mr W last updated on 06/Aug/21
Q2  abcde×9=edcba  a×90000+b×9000+c×900+d×90+9e  =e×10000+d×1000+c×100+b×10+a  a×8999+b×8990+c×800−d×910−e×9991=0  a×89999+b×8990+c×800=d×910+e×9991  ⇒a=1, e=9:  80+b×8990+c×800=d×910  8+b×899+c×80=d×91  ⇒b=0:  8+c×80=d×91  ⇒c=9:  8+720=d×91  ⇒d=8  the number is 10989.  10989×9=98901    1+0+9+8+9=27  ⇒answer B)
$${Q}\mathrm{2} \\ $$$${abcde}×\mathrm{9}={edcba} \\ $$$${a}×\mathrm{90000}+{b}×\mathrm{9000}+{c}×\mathrm{900}+{d}×\mathrm{90}+\mathrm{9}{e} \\ $$$$={e}×\mathrm{10000}+{d}×\mathrm{1000}+{c}×\mathrm{100}+{b}×\mathrm{10}+{a} \\ $$$${a}×\mathrm{8999}+{b}×\mathrm{8990}+{c}×\mathrm{800}−{d}×\mathrm{910}−{e}×\mathrm{9991}=\mathrm{0} \\ $$$${a}×\mathrm{89999}+{b}×\mathrm{8990}+{c}×\mathrm{800}={d}×\mathrm{910}+{e}×\mathrm{9991} \\ $$$$\Rightarrow{a}=\mathrm{1},\:{e}=\mathrm{9}: \\ $$$$\mathrm{80}+{b}×\mathrm{8990}+{c}×\mathrm{800}={d}×\mathrm{910} \\ $$$$\mathrm{8}+{b}×\mathrm{899}+{c}×\mathrm{80}={d}×\mathrm{91} \\ $$$$\Rightarrow{b}=\mathrm{0}: \\ $$$$\mathrm{8}+{c}×\mathrm{80}={d}×\mathrm{91} \\ $$$$\Rightarrow{c}=\mathrm{9}: \\ $$$$\mathrm{8}+\mathrm{720}={d}×\mathrm{91} \\ $$$$\Rightarrow{d}=\mathrm{8} \\ $$$${the}\:{number}\:{is}\:\mathrm{10989}. \\ $$$$\mathrm{10989}×\mathrm{9}=\mathrm{98901} \\ $$$$ \\ $$$$\mathrm{1}+\mathrm{0}+\mathrm{9}+\mathrm{8}+\mathrm{9}=\mathrm{27} \\ $$$$\left.\Rightarrow{answer}\:{B}\right) \\ $$
Answered by mr W last updated on 06/Aug/21
Q1  4×4×3×2×1=96  ⇒answer A)
$${Q}\mathrm{1} \\ $$$$\mathrm{4}×\mathrm{4}×\mathrm{3}×\mathrm{2}×\mathrm{1}=\mathrm{96} \\ $$$$\left.\Rightarrow{answer}\:{A}\right) \\ $$
Commented by SLVR last updated on 06/Aug/21
Thank you so much..mr. W sir
$${Thank}\:{you}\:{so}\:{much}..{mr}.\:{W}\:{sir} \\ $$

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