Melody

use the calculator on the home page.

Product of 2 number is 10 one of them is 15 another is what?

15x=10

x=10/15 = 2/3

the numbers are 15 and 2/3

You will need to define what a work hour is.

Someone somewhere is working always.

For instance, a ward of people in hospital are attended by a worker every minute of every day.

There is a perfectly good calculator on the home page.

Find (LCD) of 56 and 78 .

I think you really want the HCF   Highest common factor    

I'll use the web2 calc to help

factor(56) = 2^3*7       =2     *2*2*7

factor(78) = (2*3)*13  = 2      *3*13

The only common factor other than one is 2 so 2 is the highest one.

Here is why

\(\begin{align}\frac{1}{7}&:\frac{1}{8}\\~\\ \frac{1}{7}\times \frac{56}{1}&:\frac{1}{8}\times \frac{56}{1}\\~\\ \frac{1}{1}\times \frac{8}{1}&:\frac{1}{1}\times \frac{7}{1}\\~\\ 8&:7 \end{align} \)

A clock that loses 10 minutes every hour is set correctly at 10:00. What is the correct time when the clock next reads 10:00? Thanks.

I decided to do it the super long way :)

That is easy.

The third of an imperial AU mouthful plus half a flipped bottle.

Desculpe, mas isso não se traduz muito bem.

Talvez você poderia reformular isso?