I need someone to help solve some questions for my daughter.
A boy has two sticks with lengths 15cm and 25cm. He can measure the width of a table exactly with either of the sticks. The table is less than 1m wide. How wide is the table?

Kindly redirect me if i'm in a wrong section.
Thanks.

yes, you are in the wrong section. but that can be ignored sinc a mod will soon move the topic to the appropriate section.
to your question,

mathematically,
you want n1.y = n2.x = z,
where n_ > 1, and z < 100, x, y= 15, 25 rules

so we need to find a balance point for n_,
we use n1 = 5, n2 = 3

75 = 75 => z.

equation satisfied!!

You're correct. Thanks
That's d ans, just don't know how to arrive at it.