Aptitude  HCF and LCM  Practice QA-Easy

11. The H.C.F. of two numbers is 5 and their L.C.M. is 150. If one of the numbers is 25, then the other is:

 30 28 24 20

12. What is the greatest possible length which can be used to measure exactly the lengths 8 m, 4 m 20 cm and 12 m 20 cm?

 10 cm 30 cm 25 cm 20 cm

13. The least number, which when divided by 12, 15, 20 and 54 leaves in each case a remainder of 8 is:

 504 536 544 548

14. The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is:

 15 cm 25 cm 35 cm 42 cm

15. What is the greatest number which on dividing 1223 and 2351 leaves remainders 90 and 85 respectively?

 1133 127 42 1100