Question

How many natural no up to 2001 are divisible by 3 or 4 but not by 5

Answer 1

the numbers which are divisible by 3 and 4 not by 5 are ....

the number which the number which end from 0 and 5 is always divisible by 5..

so if you want to find the numbers which are not divisible by 5 you have to clarify that the number is not ends with 0 or 5.

the number which ends from 0 or 5 are.

such as 10 . 35 . 45. 50.

this types of numbers are always divisible by 5..

the numbers which are divisible by 3 and 4 but not by 5 are :

first taken LCM of 3 and 4. answer is 12

So write the 12's table.

all the numbers will end from 3,4 together..

but just clarify that the number should not be end from 0 ,5

so, the numbers are:

12,24,36,48, (don't write 60 because its ends from 0 , so it is divisible by 5) 72,84,96,108, (don't write 120). 132,144,156..............

like this you have to write....

but the numbers should not be end from 0,5

and like this you have to write a whole table of 12...

(write continuously like this , you will be able to find all the natural numbers up to 2001)

hope this will help you Mark me as brainliest