REVISION WORKSHEET -HCF, LCM

Good morning boys 
Today we are going to revise what we have studied in HFC and LCM.

Answer the following:
Q1. The LCM of 2 numbers is 180. Then which of the following is not the HCF of the numbers.
a. 45          b. 60          c. 75            d. 90

Q2. Find the HCF of the following by the long division method 75, 120, 240

Q3 Find the LCM using the prime factorization method. 75, 150, 200?

Q4. The HFC of 27 and 63 is ______?
a. 3           b. 6           c. 9             d. 18

Q5 The smallest common factor of 4, 12, 16 is ______?
a. 1          b. 2           c. 4              d. 8

Q6. The LCM of 12 and 48 is ________?
a. 6          b. 12         c. 24             d. 48

Q7 What is the HFC of 2 consecutive.
a. numbers?        b. even number?       c. Odd numbers       

Q8 Find the least number which when divided by 3, 4, 5, 6, 10 and 12 leaves a remained 2?

Q9 the school bell rings every 40 mins and the clock tower of the city center rings every 60 minutes at 8am on a day, both the bell sounded together. At what time will both ring together?

Q10. Determine the greatest 3 digit number exactly divisibe by 8, 10 and 12 

Check your answers:

Q1. c(75)
Q2. 15
Q3. 600
Q4. c(9)
Q5. c(4)
Q6. d(48)
Q7. a (1)
b(2)
c(1)
Q8. 62
Q9. 120 minutes = 2 hrs , 10am 
Q10. 960 

Thank you have a good day thats all for today.