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HCF and LCM Worksheet-7

HCF and LCM Worksheet-7

 

  1. What is the Lowest Common Multiple of 24 and 90?

(a) 360               (b) 460               (c) 240               (d) 420

 

  1. Sixth-grade has a Band Recital on every third day. Seventh-grade has a Band Recital on every fourth day. On what day will both grades have a Band Recital?

(a) 15th day        (b) 12th day        (c) 8th day        (d) 20th day

 

  1. The traffic lights at four different road crossings change after every 52 seconds, 65 seconds, and 78 seconds respectively. If they change simultaneously at 5 a.m., when will they change simultaneously again?

(a) 13 minutes past 5 a.m.          (b) 5 p.m.

(c) 20 minutes before 7 a.m.     (d) 15 minutes past 5 a.m.

 

  1. Find the least number, which when divided by 16, 24 and 56, leaves remainder 4 in each case?

(a) 340               (b) 446               (c) 160                (d) 240

 

  1. The LCM of two coprime numbers is _____.

(a) Less than one of the numbers.

(b) Equal to their product.

(c) Equal to one of the numbers.

(d) Always an odd number.

 

  1. Find the LCM of 14, 18, 24 and 32.

(a) 1,320            (b) 2,420           (c) 2,016            (d) 2,020

 

  1. The Least Common Multiple of a set of numbers is _____.

(a) Smaller than or equal to the largest of the numbers.

(b) Equal to the numbers.

(c) Smaller than the numbers.

(d) Greater than or equal to the largest of the numbers.

 

  1. Which of the following numbers is exactly divisible by each of 8, 15, and 21?

(a) 100,800      (b) 100,012       (c) 100,999       (d) 100,008

 

  1. Tom, Peter and Robert step off together to visit the Center Point Gym. Their steps measure 50 cm, 60 cm, and 65 cm respectively. What is the minimum distance each should walk so that all can cover the same distance in complete steps?

(a) 4000 cm     (b) 3900 cm     (c) 1500 cm       (d) 2000 cm

 

  1. What is least common number that is a multiple of 72, 96 and 160?

(a) 1,220            (b) 1,240            (c) 1,600            (d) 1,440

 

Answer Key:

  1. (a)
  2. (b)
  3. (a)
  4. (a)
  5. (b)
  6. (c)
  7. (d)
  8. (a)
  9. (b)
  10. (d)