Question

how many composite numbers are less than 42 but greater than 24?

Answer 1

Composite numbers between 24 and 42 are - 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42.
So these are the numbers.
Composite numbers are those whole numbers which can be divided by other numbers easily except the number 1 and the number itself.

Answer 2

let them be x
it means 24<x<42

composite numbers having factors other that 1
25,26,27,28,30,32,34,35,36,38,39,40.
x=12 numbers they are 
=25,26,27,28,30,32,34,35,36,38,39,40.

There are 12 COMPOSITE NUMBERS less than 42 but greater than 24