# Two rulers

We have two rulers. Scale interval on first rulers are a spaced 1 cm and on second spaced 15 mm. Rulers are attached to each other so that they match initial divider commas. What next dividers commas coincide? Find at least three cases.

Result

a =  30 mm
b =  60 mm
c =  90 mm

#### Solution:

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### To solve this example are needed these knowledge from mathematics:

Do you want to calculate least common multiple two or more numbers? Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation? Do you want to convert length units?

## Next similar examples:

1. School
Headteacher think whether the distribution of pupils in race in groups of 4,5,6,9 or 10. How many pupils must have at least school at possible options?
2. Norm
Three workers planted 3555 seedlings of tomatoes in one dey. First worked at the standard norm, the second planted 120 seedlings more and the third 135 seedlings more than the first worker. How many seedlings were standard norm?
3. Number with ones
The first digit of the number is 1, if we move this digit to the end we get a 3 times higher number, which is the number?
4. Simple equation
Solve for x: 3(x + 2) = x - 18
5. Counting number
What is the smallest counting number divisible by 2,5,7,8 and 15?
6. Wood dividing
Which equation calculates the number of 1/3-foot pieces that can be cut from a piece of wood that is 7 feet long?
7. Steps
Peter makes steps long 70 cm, John 45 cm long. After how many meters their footsteps meet?
8. Forest nursery
In the forest nursery after winter, they found that 1/10 stems died out of them. For them, they land 193 new spruces. How many spruces are in the forest nursery?
9. Balls groups
Karel pulled the balls out of his pocket and divide it into the groups. He could divide them in four, six or seven, and no ball ever left. How little could be a ball?
10. Simple equation
Solve the following simple equation: 2. (4x + 3) = 2-5. (1-x)
11. Lcm simple
Find least common multiple of this two numbers: 140 175.
12. Negative in equation
2x + 3 + 7x = – 24, what is the value of x?
13. Write decimals
Write in the decimal system the short and advanced form of these numbers: a) four thousand seventy-nine b) five hundred and one thousand six hundred and ten c) nine million twenty-six
14. Cents no more
Janko bought pencils for 35 cents each. Neither he nor the salesperson had small coins just a whole € 1 coin. At least how many pencils had to buy to pay for the whole euros?
15. Lcm of three numbers
What is the Lcm of 120 15 and 5
16. Customary length
Convert length 65yd 2 ft to ft
17. Find x
Solve: if 2(x-1)=14, then x= (solve an equation with one unknown)