Question

dear plz give me the answers correctly and give all answers plss it was very very very very very very very urgent to me plz help me ​

Answer 1

Answer:

ans in ATTACHMENT is of ques. 5,6

4. LCM of 30, 90, 50 is 90

3. prime factor of 130 are 2, 5, 13

7. there are ( lakh) hundred lakh in one crore

hope so dear it will help you....

Answer 2

Answer:

Solution 3 :

Prime factorization of 130 :

130 ÷ 13 = 10 ( we are dividing 130 by 13 , because 13 is a prime factor of 130 which does not has any other factor other than 1 and itself ) .

10 ÷ 5 = 2 ( we are dividing 10 by 5 because 5 is a prime factor of 10 which does not have any other factor other than 1 and itself )

2 ÷ 2 = 1 ( we are dividing 2 by itself since 2 is the only prime factor of 2 )

Hence 130 = 13 × 5 × 2 = 130 .

Therefore , 130 as a product of its prime factors can be written as = 13 × 5 × 2 = 130 .

Solution 4 :

LCM of 30 , 90 and 45 is :

30 ÷ 15 , 90 ÷ 15 , 45 ÷ 15 = 2 , 6 , 3

2 , 6 ÷ 3 , 3 ÷ 3 = 2 , 2 , 1

2 ÷ 2 , 2 ÷ 2 , 1 = 1 , 1 , 1

Hence the LCM will be = 15 × 3 × 2 = 90 .

Therefore , the LCM of 30 , 90 and 45 is = 90 .

Solution 5 :

HCF of 40 , 45 and 60

To find the HCF of some given numbers we have to write down all their factors and the highest factor which is common among all the 3 numbers will become the HCF . So , let us use this method to find the HCF of 40 , 45 and 60 .

Factors of 40 - 1 ,4, 5, 8, 10, 20, 40

Factors of 45 - 1, 3, 5, 9, 15, 45

Factors of 60 - 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

As we can see , 5 is the highest of the common factors for all the given numbers - 40 , 45 and 60 . Hence the HCF will be 5 .

Therefore , the HCF of 40 , 45 and 60 is 5 .

Solution (b) :

The number that needs to be multiplied with 530 to give 5,300,000 is :

There are totally 5 zeros in 5,300,000 , which means 53 should have 5 zeros near it to reach 5,300,000 . But since one zero is already there near 53 we need to add four more zeros .

To add four more zeros to 530 we need to multiply it with 10,000 .

Hence we need to multiply 10,000 with 530 to get 5,300,000 .

Therefore , 530 × 10,000 = 5,300,000 .

Solution 7 :

10 lakhs are needed in total to make 1 crore .

Therefore , there are 10 lakhs in one crore .

Hope you find my answer useful!!!