Home » Aptitude » LCM and HCF » Question
  1. What is the least number of square tiles required to pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad?
    1. 840
    2. 841
    3. 820
    4. 814
Correct Option: D

Length of the floor = 15 m 17 cm = 1517 cm
Breadth of the floor = 9m 2 cm = 902 cm.
Area of the floor = 1517 × 902 cm2
The number of square tiles will be least, when the size of each tile is maximum.
∴ Size of each tile = HCF of 1517 and 902 = 41

∴ Required number of tiles =
1517 × 902
= 814
41 × 41



Your comments will be displayed only after manual approval.