Before proceeding to the solution of examples and problems be sure to read the theoretical part of the lesson
Lowest common multiple
1. Write down the first five multiples of 6.
а) 6,
12, 18, 26, 30;
b) 6,
12, 16, 24, 30;
c) 6,
12, 18, 24, 32;
d) 6,
12, 18, 24, 30.
2. Write down two multiples of 7
which lie between 40 and 50.
а) 46, 49;
b) 42, 49;
c) 42, 47; d) 41, 45.
3. Write down any multiples of 4
which lie between 22 and 30.
а) 24, 28; b) 22, 28;
c) 24, 26; d) 22, 30.
4. Find the Least Common Multiple of
each of these groups of numbers
5 and 3.
а) 5; b) 3;
c) 15;
d) 10.
5. Find the Least Common Multiple of
each of these groups of numbers
8 and 12.
а) 6; b) 24;
c) 36; d)
12.
6. Find the Least Common Multiple of each of these groups of numbers
3, 4 and 8.
а) 24;
b) 8;
c) 4; d)
12.
7. Write down the LCM of
5 and 7.
а) 7; b)
70;
c) 5; d) 35.
8. Find the Least Common Multiple of each of
these pairs of numbers
4 and 7.
а) 7; b)
4;
c) 28;
d) 56.
9. Find the Least Common Multiple of each of
these pairs of numbers
6 and 9.
а) 9; b) 18;
c) 36; d)
12.
10. Find the Least
Common Multiple of each of these pairs of numbers
8 and 6.
а) 24;
b) 8;
c) 12;
d) 48.
11. Find the Least
Common Multiple of each of these pairs of numbers
168, 231 and 60.
а) 32420;
b) 38480;
c) 28560;
d) 36960.
12. In the game
of ‘Fizzbuzz’, people take it in turn to count up one number at a time. When a
multiple of 3 is reached, the person must say ‘Fizz’. When a
multiple of 5 is reached. The person much say ‘Buzz’. If a multiple
of both 3 and 5 is reached, the person says ‘Fizzbuzz’. Write down
the first 2 number when the person would have to say ‘Fizz buzz
а) 15, 45; b) 10, 30;
c) 15, 30; d) 15, 25.
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