Smallest Number Using 0 and 1 up to 7 digits

Q. What is the smallest $4$ digit number ?

1. 1000

Q.

Write all $3$ digit numbers taking each digit only once.

$1,3,5$

Q.

What does the coloured digit stands for?

2 7 7 8 5

Q. Adding '1' to the biggest 5-digit number, would give the smallest digit number.

1. $5$
2. $7$
3. $8$
4. $6$

Q. The estimated income from the sales of an online fashion shop in a month is the smallest five-digit number. Which of the following gives the income from the fashion sale of the online shop?

1. 1, 000 dollars
2. 10, 000 dollars
3. 99, 999 dollars
4. 11, 111 dollars

Q. Sophia has 99 dollars in her piggy bank. She wants her savings to become the smallest three-digit number. How much should Sophia receive from her father for her savings to reach the smallest three-digit number?

1. 1 dollar
2. 10 dollars
3. 100 dollars
4. 9 dollars