physics Quiz

Which of the following rational numbers has a terminating decimal expansion in base 5?

• 27

• 21

• 7

• 5

Which of the following is not an irrational number?

• √2

• 3

• √5

• 5

The HCF of two positive integers P and Q, where P=a³b² and Q=ab² and a, b are prime numbers, is:

• ab

• a³b²

• a²

• b³

The prime factorization of 196 is:

• 6

• 14

• 2

• 49

The smallest odd composite number is:

• 3

• 7

• 9

• 11