Set e = { three-digit numbers divisible by 8 }
find n(e) = ? ( don't mind the nos. 3 )

How far is x from 5 on a number line?

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?