Page 37 - Maths Skill - 6

Prime T
3 3 Prime Timeime

Learning Outcomes
In this chapter, you will learn about :
� Simplification � Properties of factors and multiples � To determine if a given number is prime or not
� Use of brackets � Types of numbers � Prime factorization
� Factors � Tests for divisibility of numbers � Common factors and common multiples
� Multiples � Properties of divisibility � Amusement with Numbers

Boot-Up (To Recapitulate Previous Knowledge of Concepts)

COMPETENCY BASED QUESTIONS

A. Multiple-Choice Questions

1. Which of the following is an even number?
(i) 11 (ii) 22 (iii) 23 (iv) 45
2. Which of the following is an odd number?
(i) 24 (ii) 42 (iii) 23 (iv) 100
3. The smallest prime number is
(i) 1 (ii) 2 (iii) 3 (iv) 5
4. Which of the following is an odd composite number?
(i) 35 (ii) 67 (iii) 83 (iv) 98
5. Which of the following is one of the multiples of number 9?
(i) 36 (ii) 42 (iii) 78 (iv) 80

B. Fill in the Blanks

1. The common factor of numbers 3 and 4 is ___________.

2. The lowest common multiple of numbers 3 and 5 is ___________.
3. ___________ is the smallest composite number.
4. The 2nd smallest multiple of a number is a/an ___________ number.

5. ___________ is a smallest prime number.

C. Write ‘T’ for true and ‘F’ for false Statements

1. A number is divisible by 15 is also divisible by 3 and 5.

2. 91 is a prime number. 3. 7 is the HCF of 343 and 140.

4. 2, 3, 7 are the prime factors of 266. 5. 385, 462 are co-primes.