Find the common factors of 10 and 15. 2. 3. 4. 5. Determine the common factors of 12 and 27. Find the common factors of the following numbers: (i) 25, 45,70 (ii) 27, 36, 81 (iii) 64, 16, 48 Is 4 a common factor of 36, 44 and 100? Use prime factorisation to find HCF ofthe following: (i) 66,330 (ii) 45,75 (iii) 54,81 (iv) 64,80 (v) 64, 96, 216 (vi) 70, 105, 175 (vii) 91, 175, 49 (viii) 18,54,81 Use division method to find HCF of the following: (i) 72, 126 (ii) 36,84 (iii) 34, 102 (iv) 27,63 (v) 924, 1463, 1925 (vi) 1134, 1344, 1638 Find the GCD of the following numbers. (i) 900, 550 (ii) 1896, 1106 (iii) 339, 781, 1004 (iv) 55, 99, 132, 121 (v) 115, 1125, 130 Find the greatest number that can divide 72, 108 and 144 without remainder. Find the largest number that divides 220,313 and 716 leaving remainder 3 in each case. 6. 7. 8. 9. 10. Find the greatest number such that if 245 and 1029 be divided by it, the remainder in each case is 5. divide 623,729 and 841 leaving remainders 3, 9 and 1 respectively .
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54,81 (iv) 64,80 (v) 64, 96, 216 (vi) 70, 105, 175 (vii) 91, 175, 49 (viii) 18,54,81 Use division method to find HCF of the following: (i) 72, 126 (ii) 36,84 (iii) 34, 102 (iv) 27,63 (v) 924, 1463, 1925 (vi) 1134, 1344, 1638 Find the GCD of the following numbers. (i) 900, 550 (ii) 1896, 1106 (iii) 339, 781, 1004 (iv) 55, 99, 132, 121 (v) 115, 1125, 130 Find the greatest number that can divide 72, 108
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