kwizNET Subscribers, please login to turn off the Ads!
Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
5.6 L.C.M.

Example:
Find the L.C.M. of 60 and 72.

Solution:
Prime factors of 60 = 2 * 2 * 3 * 5
Prime factors of 72 = 2 * 2 * 2 * 3 * 3
The common prime factors of 60 and 72 are 2, 2 and 3
The remaining prime factors of 60 are 5.
The remaining prime factors of 72 are 2 and 3.
Therefore, L.C.M. = Common prime factors of 60 and 72 * the prime factors left in 60 * the prime factors left in 72.
= 2 * 2 * 3 * 2 * 3 * 5.
= 360.
Therefore, L.C.M. of 60 and 72 is 360.


Directions: Solve the following problems. Also write at least ten examples of your own.
Q 1: Find the L.C.M. of 24 and 72.
48
72
64
36

Q 2: Find the L.C.M. of 72 and 126.
504
420
480
380

Q 3: Find the L.C.M. of 24 and 36.
36
72
48
None of these

Q 4: Find the L.C.M. of 56 and 88.
416
716
516
616

Q 5: Find the L.C.M. of 12, 36 and 48.
48
86
144
98

Q 6: Find the L.C.M. of 30 and 80.
140
180
160
240

Q 7: Find the L.C.M. of 124 and 248.
124
248
None of these
148

Q 8: Find the L.C.M. of 24 and 56.
178
148
168
158

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


Subscription to kwizNET Learning System offers the following benefits:

  • Unrestricted access to grade appropriate lessons, quizzes, & printable worksheets
  • Instant scoring of online quizzes
  • Progress tracking and award certificates to keep your student motivated
  • Unlimited practice with auto-generated 'WIZ MATH' quizzes
  • Child-friendly website with no advertisements
  • Choice of Math, English, Science, & Social Studies Curriculums
  • Excellent value for K-12 and ACT, SAT, & TOEFL Test Preparation
  • Get discount offers by sending an email to discounts@kwiznet.com

Quiz Timer