Which pair of numbers has no common factors?

8 and 12

9 and 16

15 and 25

20 and 30

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Q1.

What is the size of the largest square tile Sameeksha should buy for a room measuring 12 ft by 16 ft?

Q2.

If Sameeksha uses tiles of size 4 ft, how many tiles will she need to cover the entire floor area of the room?

Q3.

What is the Highest Common Factor (HCF) of 12 and 16?

Q4.

Which of the following dimensions can also fit evenly into the length of Sameeksha's room apart from tiles of size 4 ft?