Finding common ground

Why is the chapter "Finding Common Ground" important?

1. It teaches only multiplication tables.
2. It helps students understand factors, multiples, HCF, LCM, and their applications in solving mathematical and everyday problems.
3. It is useful only in examinations.
4. It has no practical applications.

If the HCF of two numbers is 1, the numbers are called:

1. Composite numbers
2. Prime numbers
3. Co-prime numbers
4. Even numbers

Why do we learn HCF and LCM?

1. To make calculations difficult
2. To solve mathematical and real-life grouping and scheduling problems
3. To avoid multiplication
4. To replace geometry

What is the LCM of 3 and 9?

1. 3
2. 6
3. 9
4. 27

What is the HCF of 15 and 25?

1. 10
2. 15
3. 5
4. 25

Which concept is useful when adding fractions with different denominators?

1. HCF
2. LCM
3. Prime numbers only
4. Division

Which concept is mainly used to simplify fractions?

1. LCM only
2. HCF
3. Perimeter
4. Area

What is the LCM of 5 and 7?

1. 12
2. 35
3. 70
4. 5

Which pair of numbers is co-prime?

1. 8 and 12
2. 9 and 15
3. 7 and 10
4. 18 and 24

What is the HCF of two prime numbers?

1. 0
2. 1
3. The larger prime number
4. 2

Which method can be used to find both HCF and LCM?

1. Prime factorization
2. Drawing circles only
3. Measuring angles
4. Counting backwards

What is the Least Common Multiple (LCM)?

1. The smallest factor common to all numbers
2. The smallest number that is a multiple of all the given numbers
3. The largest factor of a number
4. The sum of the numbers

What is the HCF of 24 and 36?

1. 6
2. 8
3. 12
4. 18

What is the Highest Common Factor (HCF) of two or more numbers?

1. The largest number among them
2. The greatest number that divides each of the given numbers exactly
3. The smallest multiple of the numbers
4. The difference between the numbers