(i) 3 × 5 = 15. Here 3 and 5 are ______ of 15.
(ii) 6 × 7 = 42. Here 42 is the ______ of 6 and 7.
(iii) The numbers with only 2 factors are called ______ numbers.
(iv) The HCF of co-prime number is ______
(v) A number can have ______ multiples.
(vi) LCM of two co-prime numbers is their ______
(vii) HCF of two or more numbers always ______ their LCM.
(i) A multiple of 7 which lies between 30 and 40.
(ii) A multiple of 5 and 2 which is 2 more than the third multiple of 6.
(iii) A multiple of 3 and 5 greater than 42 but less than 47.
(iv) 2 digit prime number less than 47. The product of my digits is 21.
(v) Multiple of 3 but not of 6 and 9 greater than 22 but less than 37.
(vi) Two digit odd composite number. Sum of my digits is 12 and I am greater than 89.
(i) 4
(ii) 7
(iii) 13
(i) 15 and 20
(ii) 24, 36 and 42
(iii) 36 and 170
(iv) 90, 108 and 126
(i) 86, 190 by 3
(ii) 47, 815 by 3
(iii) 2, 37, 405 by 11
(iv) 81, 620 by 4
(i) 42 and 84
(ii) 55 and 105
(iii) 32 and 124
(iv) 35, 25 and 15
(v) 80, 140 and 200
(i) Find the prime factor of 84.
(ii) Write the prime numbers between 11- 30.
(iii) Find the common multiples of 2, 8 and 12.
(iv) The LCM of 25 and 65 is 325. Find their HCF.
(v) The LCM of two numbers is 1344 and their HCF is 4. If one of the numbers is 84, find the other number.
(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.
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