ML Aggarwal Playing With Numbers Exe-4.4 Class 6 ICSE Maths Solutions. We Provide Step by Step Answer of Exe-4.4 Questions for Playing With Numbers as council prescribe guideline for upcoming board exam. Visit official Website CISCE for detail information about ICSE Board Class-6.
ML Aggarwal Playing With Numbers Exe-4.4 Class 6 ICSE Maths Solutions
| Board | ICSE |
| Publications | Avichal Publishig Company (APC) |
| Subject | Maths |
| Class | 6th |
| Chapter-4 | Playing With Numbers |
| Writer | ML Aggarwal |
| Book Name | Understanding |
| Topics | Solution of Exe-4.4 Questions |
| Edition | 2023-2024 |
Playing With Numbers Exe-4.4
ML Aggarwal Class 6 ICSE Maths Solutions
Page-81
Question 1. Find the H.C.F. of the given numbers by prime factorization method :
(i) 28, 36
(ii) 54, 72, 90
(iii) 105, 140, 175
Answer:
(i) Prime factorization of given number are
28 = 2 x 2 x 7
36 = 2 x 2 x 3 x 3
Notice that 2 occurs as a common prime factor at least 2 times in both given
numbers.
so, H.C.F = 2 x 2-4
(ii) Prime factorization of the given numbers are
54 = 2 x 3 x 3 x 3
72 = 2 x 2 x 2 x 3 x 3
90 = 2 x 3 x 3 x 5
Notice that 2 occurs as a common prime factor at least one times and 3 at least two times in given numbers.
so, H.C.F = 2 x 3 x 3 = 18
(iii) Prime factorization of given numbers are:
105 = 3 x 5 x 7
140 = 2 x 2 x 5 x
175 = 5 x 5 x 7
Notice that 5 occurs as a common prime factor at least one time and 7 one time
given numbers.
so, H.C.F = 5 x 7 = 35
Question 2. Find the H.C.F. of the given numbers by division method:
(i) 198, 429
(ii) 20, 64, 104
(iii) 120, 144, 204
Answer:
(i) 198, 429
Last reminder = 0
So, H.C.F. = 33 (it is last divisor)
(ii) 20, 64, 104
Find the HCF of 20 and 64
HCF of 20 and 64 = 4
Now, find the HCF of 4 and 104
So , HCF of 20, 64, 104 = 4
(iii) 120, 144, 204
Find the HCF of 120 and 144
HCF of 120 and 204 is 12
Now, find the HCF of 12 and 144
So , HCF of 120, 144, 204 = 12
Question 3. Fill in the blanks:
(i) HCF of two consecutive natural numbers is ……
(ii) HCF of two consecutive odd numbers is …..
(iii) HCF of two consecutive even numbers is ……
Answer:
(i) HCF of two consecutive natural numbers is 1.
(ii) HCF of two consecutive odd numbers is 1.
(iii) HCF of two consecutive even numbers is 2.
Question 4. Find the greatest number which can divide 257 and 329 so as to leave a remainder 5 in each case. .
Answer:
When 257 is divided by the required number, 5 is left as a remainder.
So, 257-5 = 252 (ex. 252 is exactly divisible)
by that number.
Similarly 329-5 = 324 (is exactly divisible by that number).
So, 252 and 324 are both divisible by that number.
Thus, the required number is the H.C.E. of 252 and 324.
Hence, the required number 36
Question 5. Find the largest number that will divide 623, 729 and 841 leaving remainder 3, 9 and 1 respectively.
Answer:
Numbers are 623, 729 and 841 and remainders are 3, 9. 1 respectively
So, Numbers will be 623-3 = 620
729 – 9 = 720
841 – 1 = 840
Now, let us find the H.C.E. of 620, 720 and 840
The HCF of 620, 720, and 840 is 20
So, The largest number = 20
Question 6. Meenu purchases two bags of rice of weights 75 kg and 69 kg. Find the maximum value of weight which can measure the weight of the rice exact number of times.
Answer:
Weight of two bags = 75 kg and 69 kg
Factor of 75 is = 3 x 5 x 5
and Factor of 69 is = 3 x 23
So, HCF of 75 and 69 is = 3
The maximum value of weight which can measure the weight of the rich exact number of times is 2 kg
Question 7. Three tankers contain 403 litres, 434 litres and 465 litres of diesel respectively. Find the maximum capacity of a container that can measure the diesel of three containers exact number of times.
Answer:
Three tankers capacity is 403, 434, 465
So, maximum capacity of a container, that can measure the diesel of three tankers
= HCF of 403, 434, 465 = 31
So, Reburied measure = 31 ltr
— : End of ML Aggarwal Playing With Numbers Exe-4.4 Class 6 ICSE Maths Solutions :–
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