Multiple choice general knowledge math & puzzles

What is the least number of squares tiles required to pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad?

  1. 814

  2. 820

  3. 840

  4. 844

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dimensions are 1517 cm and 902 cm. The HCF of 1517 and 902 is 41. The area of one tile is 41*41. Number of tiles = (1517 * 902) / (41 * 41) = 37 * 22 = 814.