Question

Riya's roll number is the smallest six-digit number that can be formed using the numbers: 1, 2, 0, 9, 4, and 7. What's her roll number?

• A. 124790
• B. 102479
• C. 012479
• D. 974210

Answer 1

The correct option is B 102479

As we need to find the smallest six-digit number, we will arrange the given numbers in increasing order. We get
0, 1 , 2, 4, 7, 9

Placing 0 at the starting of a number is insignificant.
012479 = 12479 makes it a five-digit number.

Since we need a six-digit number, we will place 0 after 1. Riya's roll number is 102479.