Question

how many numbers less than 10000 are there which are divisible by 15,20,25

Answer 1

Given numbers are 15,20,25.

LCM of 15 = 3 * 15

LCM of 20 = 2 * 2 * 5

LCM of 25 = 5 * 5


LCM of 15,20,25 = 2 * 2 * 3 * 5 * 5

                            = 300.


Therefore the numbers less than 10000 divisible by 15,20,25 = 10000/300

                                                                                                        = 33.33

Therefore the required answer is 33.


Hope this helps!