EXERCISE 3.4 1 Find the common factors of (a) 20 and 28 (b) 15 and 25 (c) 35 and 50 (d) 56 and 120 2. Find the common factors

Question

EXERCISE 3.4
1 Find the common factors of
(a) 20 and 28 (b) 15 and 25 (c) 35 and 50 (d) 56 and 120
2. Find the common factors of –
(a) 4,8 and 12 (b) 5.15 and 25
3. Find first three common multiples of
(a) 6 and 8
(bol 2 and 18
4. Write all the numbers less than 100 which are common multiples of 3 and 4.
5. Which of the following numbers are co-prime?
(a) 18 and 3 (b) is and 37
(c) 30 and 415
(d) 17 and 68 (e) 216 and 215 ( 81 and 16
6. A number is divisible by both 5 and 12. By which other number will that number be
always divisible?
7. A number is divisible by 12. By what other numbers will that number be divisible?‚Äč

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Camila 1 week 2021-09-07T13:43:51+00:00 1 Answer 0 views 0

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    2021-09-07T13:45:25+00:00

    Answer:

    1(a) 20=(2)(2)(4)

    28= (2) (2) (7)

    common factors = (2) (2)

    = 4

    (note : ( ) indicates the sign of multiplication

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18:9+8+9*3-7:3-1*13 = ? ( )