The greatest common divisor of 16, 18 and 14 is 2.
The result is 2.
2. A box of sugar, 4 pieces of sugar, 6 pieces of sugar, 7 pieces of sugar, 7 pieces of sugar, turned out to be one more. How much is this box of candy?
The greatest common multiple of 4, 6 and 7 is 84.
84+ 1=85
The result is 85
3. Daguan New Village is the starting point of Bus No.3 and Bus No.58. Bus No.3 leaves every 10, and bus No.58 leaves every 15. How many minutes will the two cars leave at the same time?
The least common multiple of 10 and 15 =30.
It will take at least 30 minutes.
4. A floor tile is 75cm long and 45cm long. How many bricks can be used to make a square floor with this brick? If you want to use this brick to pave a rectangular conference room with a length of15m and a width of10m, how many tiles do you need at least?
Least common multiple of 45 and 75 225
So the side length of the square paved with this brick should be 225 cm.
225 divided by 45 equals 5 (5 blocks per row). 225 divided by 75 equals 3 (3 blocks per vertical row). 3 times 5 equals 15.
So paving a square with a side length of 225 cm requires 15 square bricks.
How many tiles does it take to lay a rectangular conference room with a length of15m and a width of10m?
15m = 1500m， 10m = 1000m。
1500/75=20 (20 pieces per vertical row)
1000/45=23 (22.22222 blocks per line, note: because it means at least, one-step method should be used to get 23).
20 times 23 equals 460.
So at least 23 yuan is needed.