Question

1. (a) Find the smallest number which when divided by 14 and 21 leaves no remainder.
(b) Find the smallest number that is divisible by 27 and 36.
2. (a) Find the smallest number that is divisible by 4, 8 and 12.
(b) Find the smallest number which when divided by 14, 28 and 56 leaves no remainder.
3. (a) Find the smallest number that leaves 5 as remainder when divided by 36 and 54.
(b) Find the smallest number which when reduced by 2 becomes divisible by 24, 48 and 64.
4. What is the smallest number of chairs that can be arranged in
rows of 9 or 15?
5. Jack and Jill stand on the same tile of a tiled floor. Jack starts jumping
to every third tile in a row. And Jill starts jumping to every second
tile in that row. Which is the first tile on which both land?
6. The alarms on two mobile phones ring together once. If one
rings every 15 minutes and the other rings every 25 minutes,
after how many minutes will they ring together again?
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Answer 1

Answer:

(a) Find the smallest number which when divided by 14 and 21 leaves no remainder.

(b) Find the smallest number that is divisible by 27 and 36.

2. (a) Find the smallest number that is divisible by 4, 8 and 12.

(b) Find the smallest number which when divided by 14, 28 and 56 leaves no remainder.

3. (a) Find the smallest number that leaves 5 as remainder when divided by 36 and 54.

(b) Find the smallest number which when reduced by 2 becomes divisible by 24, 48 and 64.

4. What is the smallest number of chairs that can be arranged in

rows of 9 or 15?

5. Jack and Jill stand on the same tile of a tiled floor. Jack starts jumping

to every third tile in a row. And Jill starts jumping to every second

tile in that row. Which is the first tile on which both land?

6. The alarms on two mobile phones ring together once. If one

rings every 15 minutes and the other rings every 25 minutes,

after how many minutes will they ring together again?