Question

Ninety million ninety thousand ninety is _______.
(a)9090090
(b)909090
(c)90090090
 (d)9090900

Answer 1

Hint: Chart out the place value chart and find the digits with the help of the chart. Expand the digit obtained and find the place value of each digit with reference to the place value chart.

Complete step-by-step answer:

In a place value chart, the digits are grouped in these in a big number. The number is read from left to right as billion – million – thousands – ones.
Now let us draw the place value chart of the international system.

\[\therefore \] 100,000 = 100 thousand
1,000,000 = 1 million
10,000,000 = 10 million
100,000,000 = 100 million
We have been given ninety million ninety thousand ninety. Let us find the digits by placing it in the place value chart.

Thus ninety million ninety thousand ninety = 90090090.
We can expand it as,
90090090 = 9 \[\times \] 10000000 + 0 \[\times \] 1000000 + 0 \[\times \] 100000 + 9 \[\times \] 10000 + 0 \[\times \] 1000 + 0 \[\times \] 100 + 9 \[\times \] 10 + 0 \[\times \] 1
Thus we got the required answer.
\[\therefore \] Option (b) is the correct answer.

Note: The place value of digit zero at any place is zero. Thus the zeroes in 90090090, their places values will be zero unlike the digit 9, which has a place value.