(i) 3 × 5 = 15. Here 3 and 5 are ______ of 15.
Ans: factors
(ii) 6 × 7 = 42. Here 42 is the ______ of 6 and 7.
Ans: multiple
(iii) The numbers with only 2 factors are called ______ numbers.
Ans: prime
(iv) The HCF of co-prime number is ______
Ans: 1
(v) A number can have ______ multiples.
Ans: many
(vi) LCM of two co-prime numbers is their ______
Ans: Products
(vii) HCF of two or more numbers always ______ their LCM.
Ans: divides
(i) A multiple of 7 which lies between 30 and 40.
Ans: 35
(ii) A multiple of 5 and 2 which is 2 more than the third multiple of 6.
Ans: 20
(iii) A multiple of 3 and 5 greater than 42 but less than 47.
Ans: 45
(iv) 2 digit prime number less than 47. The product of my digits is 21.
Ans: 37
(v) Multiple of 3 but not of 6 and 9 greater than 22 but less than 37.
Ans: 33
(vi) Two digit odd composite number. Sum of my digits is 12 and I am greater than 89.
Ans: 93
(i) 4
Ans: 4, 8, 12
(ii) 7
Ans: 7, 14, 21
(iii) 13
Ans: 13, 26, 39
(i) 15 and 20
Ans: 5
(ii) 24, 36 and 42
Ans: 6
(iii) 36 and 170
Ans: 2
(iv) 90, 108 and 126
Ans: 18
(i) 86, 190 by 3
Ans: divisible
(ii) 47, 815 by 3
Ans: divisible
(iii) 2, 37, 405 by 11
Ans: not divisible
(iv) 81, 620 by 4
Ans: divisible
(i) 42 and 84
Ans: 84
(ii) 55 and 105
Ans: 1155
(iii) 32 and 124
Ans: 992
(iv) 35, 25 and 15
Ans: 525
(v) 80, 140 and 200
Ans: 2800
(i) Find the prime factor of 84.
Ans: 2 × 2 × 3 × 7
(ii) Write the prime numbers between 11- 30.
Ans: 13, 17, 19, 23, 29
(iii) Find the common multiples of 2, 8 and 12.
Ans: 24
(iv) The LCM of 25 and 65 is 325. Find their HCF.
Ans: 5
(v) The LCM of two numbers is 1344 and their HCF is 4. If one of the numbers is 84, find the other number.
Ans: 64
(vi) Sam visits the library every fourth day and Ron every sixth day. Find out days on which both meet in the library in the month of April.
Ans: 12th day and 24th day
28 videos|169 docs|41 tests
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1. What is the meaning of "Be My Multiple, I'll be Your Factor"? |
2. How can I determine if a number is a multiple of another number? |
3. What does it mean for a number to be a factor of another number? |
4. How can I find the factors of a given number? |
5. Can a number have more than one multiple and more than one factor? |
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