Find the total numbers with 8 and 4 digits, and subtract them.
Answer (1)
20th Mar, 2023
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Numbers with 8 digits: \begin{aligned} &=99999999-10000000\ &=89999999+1\ &=90000000 \end{aligned}
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Numbers with 4 digits: \begin{aligned} &=9999-1000\ &=8999+1\ &=9000 \end{aligned}
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Nine crore |
Nine thousand |
On subtracting them, we get:
\begin{aligned}
&=90000000-9000\
&=89991000
\end{aligned}
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