Question

Lcm=20 so I got 120/200and150/200then find ten rational numbers in this

Answer 1

Since the denominators are the same you can find rationals numbers between the numerator.

So the rational numbers between $\frac{120}{200}$ and $\frac{150}{200}$ are ⇒

$\frac{121}{200},\frac{122}{200},\frac{123}{200}, \frac{124}{200},\frac{125}{200},\frac{126}{200},\frac{127}{200},\frac{128}{200},\frac{129}{200},\frac{130}{200}, \frac{131}{200}, \frac{132}{200}, \frac{133}{200}, \frac{134}{200}, \frac{135}{200}, \frac{136}{200}, \frac{137}{200}, \frac{138}{200}, \frac{139}{200},$$\frac{140}{200}, \frac{141}{200}, \frac{142}{200}, \frac{143}{200}, \frac{144}{200}, \frac{145}{200}, \frac{146}{200}, \frac{147}{200}, \frac{148}{200}, \frac{149}{200}$

Now you can choose any ten rational numbers you like and your answer would be done.