Quiz on LCM and hCF

Quiz1

Chapter 1 (real numbers)

Answer these questions:

Q1. Find HCF of the following given numbers

        (1) 84 & 99

        (2) 150, 210, 270

        (3) 1080, 720, 1200

        (4) 736, 884, 940

        (5) 10876, 53824, 15332

Q2. Find LCM of the following given numbers

        (1) 75, 100, 125

        (2) 36, 48, 30

        (3) 70, 84, 21

        (4) 150, 200, 100

        (5) 5, 10, 15, 20

Q3. Find least number which when divided by 12, 15, 20, 54 leaves a remainder of 4 in each case.

Q4. Find greatest number of 5 digits which when divided by 3, 5, 8, 12 have 2 as remainder.

Q5. The LCM of two numbers is 1920 and their HCF is 16. If one of the numbers is 128, find the other number.

Q6. The HCF and product of the numbers are 15 and 6300 respectively. Find LCM of the two numbers.

Q7. Four Iron metal rods of lengths 78 cm, 104 cm, 117 cm and 169 cm are to be cut into parts of  equal length. Each part must be as long as possible. What is maximum length of each part.

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