Mathematics
Answer
(i) The factors of 20 are 1, 2, 4, 5, 10 and 20.
The factors of 28 are 1, 2, 4, 7, 14 and 28.
Hence, the common factors of 20 and 28 are 1, 2 and 4.
(ii) The factors of 35 are 1, 5, 7 and 35.
The factors of 50 are 1, 2, 5, 10, 25 and 50.
Hence, the common factors of 35 and 50 are 1 and 5.
(iii) The factors of 56 are 1, 2, 4, 7, 8, 14, 28 and 56.
The factors of 120 are 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60 and 120.
Hence, the common factors of 56 and 120 are 1, 2, 4 and 8.
Related Questions
Write first six multiples of the following natural numbers:
(i) 3
(ii) 5
(iii) 12
Write:
(i) the seventh multiple of 36
(ii) the even multiples of 9 less than 100
(iii) the odd multiples of 17 less than 150
(iv) the first 3-digit even multiple of 7
(v) the multiples of 6 between 40 and 80
(vi) the greatest 2-digit even multiple of 5
Find the common factors of:
(i) 4, 8, 12
(ii) 10, 30 and 45
Write all natural numbers less than 100 which are common multiples of 3 and 4.