Question

How many numbers between 100 and 1000 is divisible by 3 and 5, but not divisible by
30?

Answer 1

@brainzonly @Unavailabilityy @FaiqRaees

Answer 2

@brainzonly can u help me :D

Answer 3

SOOOOOOOOOOO EASY!!!
667

Answer 4

lol

Answer 5

The sum of the numbers add up to 1000, and in that case it would be 333.333 + 666.677= 1000 and 666.677=667. Do the rounding. It should be 667

Answer 6

How about a hard q now like you said? :D

Answer 7

That's make sense :/
I mean... not really XD

Answer 8

@mathmate

Answer 9

`How many numbers between 100 and 1000 is divisible by 3 and 5, but not divisible by 30?`
do you mean `3 and 5` or "3 OR 5" ?

Answer 10

and
The question said 'and'

Answer 11

Doesn't that mean 15 qualifies, but 25 does not?

Answer 12

yup

Answer 13

The question asks between 100 and 1000.
Can you find how many such numbers there are between 1 and 100?

Answer 14

It should be 100 / (3 x 5) ?

Answer 15

what would that be?

Answer 16

6

Answer 17

Owhh... I see

Answer 18

I think you meant floor(100/15). Yes 6 is correct for 15.
How about "not 30"?

Answer 19

just eliminate it with (100/30)

Answer 20

thx

Answer 21

So you got for 1 to 100 floor(100/15)-floor(100/30), right?

Answer 22

yeahhh...

Answer 23

Do you know how to finish the problem? I think you can write the expression for 100 to 1000.

Answer 24

It would be (1000/15 - 100/15) - (1000/30 - 100/30)

Answer 25

We will go to the next question. Tq

Answer 26

Almost! Use floor!
and reread the question.