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Worksheet Question (Part - 2) - Playing with Numbers Notes | EduRev

Mathematics (Maths) Class 6

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Class 6 : Worksheet Question (Part - 2) - Playing with Numbers Notes | EduRev

The document Worksheet Question (Part - 2) - Playing with Numbers Notes | EduRev is a part of the Class 6 Course Mathematics (Maths) Class 6.
All you need of Class 6 at this link: Class 6

Ques 1: Fill up the blanks: 
(i) Write all even prime numbers __________.
(ii) Number of factors of 2 are __________.
(iii) Smallest pair of co-prime numbers is __________.
(iv) Smallest twin prime numbers are __________.
(v) The largest 2-digit number which is odd and prime is __________.
Ans: (i) 2
(ii) two (1 and 2)
(iii) (2, 1)
(iv) 3, 5
(v) 97

Ques 2: Find the smallest number which is divisible by 2, 3, 4, and 5. Can we find a largest number which is divisible by 2, 3, 4 and 5?
Ans: 60, No

Ques 3: Write smallest 3-digit number which is exactly divisible by 6.
Ans: 102

Ques 4: Replace '*' by the smallest possible digit so that the following numbers are divisible by 3 and 9: 
(i) *4129 
(ii) 2*985 
(iii) 987*32 
Ans: (i) 2
(ii) 3
(iii) 7

Ques 5: Write the largest 3-digit number which is divisible by 11.
Ans: 990

Ques 6: Find HCF of : 15 m 60 cm and 20 m 16 cm.
Ans: 24 cm

Ques 7: Find the least number which when divided by 25, 40 and 60 leave the remainder 7 in each case.
Ans: 607

Ques 8: Find HCF of 90 and 243 check if it divides 90 and 243 both?
Ans: HCF = 9, yes

Ques 9: Find LCM of 18 and 15. Check if the LCM so obtained is divisible by 15 as well as 18.
Ans: LCM = 90, yes

Ques 10: Match the following:

(i) HCF of two consecutive numbers
(a) 4
(ii) LCM of two co-prime numbers
(b) 97
(iii) HCF of two consecutive even numbers
(c) 1
(iv) Smallest composite number
(d) 2
(v) Largest 2-digit prime number
(e) product of two numbers

Ans. (i) ↔ (c)
(ii) ↔ (e)
(iii) ↔ (d)
(iv) ↔ (a)
(v) ↔ (b)

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  •    Oct 23, 2018
  •    Class 6
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