2. Class 6 Factors, Multiples

Question 1

What is a factor

Answer 1

A factor of a number is exact divisor of the number

Question 2

Is the factor less or greater than its multiple

Answer 2

Less than or equal to

Question 3

Is the multiple of a number less than or greater than equal to factor

Answer 3

Greater than or equal to

Question 4

Is there any number that is factor of every number

Answer 4

Yes. 1

Question 5

Can multiple be its own factor

Answer 5

yes. Every number a factor of its own

Question 6

Every factor of a number is exact divisor of its number

Answer 6

Yes

Question 7

Every factor is less than or equal to given number?

Answer 7

Yes

Question 8

how many number of factors will be there for a given number?

Answer 8

Finite

Question 9

Is every multiple of a given number is less than or equal to its given number?

Answer 9

No

Question 10

Is every number is multiple of itself?

Answer 10

Yes

Question 11

What is a perfect number?

Answer 11

Sum of all factors of a given number is equal to twice of the given number then it is called perfect number

Question 12

What is a prime number?

Answer 12

A number whose factors are 1 and the number itself

Question 13

What are composite numbers?

Answer 13

A number which has more than 2 factors are called composite numbers

Question 14

Is 1 a prime number or a composite number?

Answer 14

1 is neither prime nor composite

Question 15

Who is Greek Mathematician Eratosthenes?

Answer 15

He invented how to find prime numbers with checking their factors and the method is called Sieve of Eratosthenes.

Question 16

What are even and odd numbers?

Answer 16

Even: Numbers which are multiples of 2 are called even numbers.
Odd: Numbers which are not even.

Question 17

Which is the smallest prime number which is even?

Answer 17

2

Question 18

Every prime number except 2 is Odd?

Answer 18

Yes

Question 19

Sum of two even numbers is always

Answer 19

Even

Question 20

Sum of two odd numbers is always

Answer 20

Even

Question 21

Sum of one even and one odd number is always

Answer 21

Odd

Question 22

If you add an odd number even number of times, the result is odd or even?

Answer 22

Even

Question 23

If you add an odd number odd number of times, the result is odd or even?

Answer 23

Odd

Question 24

What are twin primes

Answer 24

Two prime numbers whose difference is 2 are called twin prime numbers

Question 25

What is the divisibility rule to check whether a number is divisible by 3 or not?

Answer 25

Add the digits. If the sum is divisible by 3 then the number is divisible by 3

Question 26

What is the divisibility rule to check whether a number is divisible by 6 or not?

Answer 26

If a number is divisible by both 2 and 3 then the number is divisible by 6

Question 27

What is the divisibility rule to check whether a number is divisible by 4 or not?

Answer 27

If a number formed by grouping ones digit and tens digit is divisible by 4 then whole number is divisible by 4

Question 28

What is the divisibility rule to check whether a number is divisible by 8 or not?

Answer 28

If a 4-digit number formed by grouping one's digit, tens digit, hundred digit is divisible by 8 then whole number is divisible by 8

Question 29

What is the divisibility rule to check whether a number is divisible by 9 or not?

Answer 29

Add the digits. If the sum is divisible by 9 then the number is divisible by 9

Question 30

What is the divisibility rule to check whether a number is divisible by 11 or not?

Answer 30

find the difference between the sum of the digits at odd places (from the right) and the sum of the digits at even places (from the right) of the number. If the difference is either 0 or divisible by 11, then the number is divisible by 11.