What is the place value of 5 in the number 6524783?

1. 5 lakh

2. 5 ten thousand

3. 50 thousand

4. 5 crore

Which of the following numbers is a factor of every number?

1. 0

2. 1

3. 2

4. 3

Which of the following is a well-defined set?

1. The set of tall students in a class

2. The set of good books

3. The set of prime numbers less than 20

4. The set of beautiful flowers