Question

The population of a city is $4,90,50,102.$ Out of these: $1,90,40,102$ are men and $1,00,37,893$ are Women.

Find the number of children in the city

Write this in words as a number in the International system.

What is the product of the place values of the two 7s in this number?

Answer 1

Step 1:

Find the population of the childrenPopulation of a city is $4,90,50,102.$

Population of men =$1,90,40,102$

Population of women = $1,00,37,893$

Number of children = Total population - (Population of men + Population of women)

$$\begin{gathered} =4,90,50,102-(1,90,40,102+1,00,37,893) \\ =4,90,50,102-2,90,77,995 \\ =1,99,72,107 \end{gathered}$$

Hence, the population of children is $1,99,72,107$

Step 2:

Write in words

$1,99,72,107$ in international number system is :-

$19,972,107$-$\mathrm{Ninteen}\mathrm{million}\mathrm{nine}\mathrm{hundred}\mathrm{seventy}\mathrm{two}\mathrm{thousand}\mathrm{one}\mathrm{hundred}\mathrm{and}\mathrm{seven}.$

Step 3:

Find place value of both $7\text{'}s$ in $19,972,107$

Place value of $7$ is $70,000\&7$

Step 4:

Find the product

Product is $70,000\times 7$

=$49,000$

Hence, the product is $49,000$