Multiples of both 3 and 5

Question

You are given a task to find all of the whole numbers below 100 that are multiples of both 3 and 5.
Create an array of numbers below 100 that are multiples of both 3 and 5, and output it.

#my approaches:
#1st method
print([j for j in range(100) if (j % 3 ==0) and (j % 5 ==0)])

#2nd method
nums=[]
for i in range(100):
if(i%3==0 and i%5==0):
nums.append(i)
print(nums)

#Using numpy
import numpy as np
data = np.arange(100)
print([j for j in data if (j % 3 ==0) and (j % 5 ==0)])

Have been able to move formward but still cannot see whats wrong ?
Please someone post a working code.

Answer 1

The following code is accepted, not sure if anything changed at the SoloLearn side.

import numpy as np

data = np.arange(1, 100)
data = data[(data%3 == 0) & (data%5 == 0)]

print(data)

Answer 2

A number fully divisible by both 3 and 5 are 15 and its multiples.

Have you tried to % by 15? at least it's doing % operation only once, rather than checking % on 3 and 5 for each number.

You may also skip % operation by using range() starting from 15, and stepping of 15 also.

Answer 3

I don't know why either, but maybe you can try to exclude zero from the result list? it wasn't clear whether zero was to be included or not though.

Answer 4

@Ipang Thanks for the reply. The output i am getting in all 3 approaches is same. i.e. [15, 30, 45, 60, 75, 90]. Don't know why its not getting accepted

Answer 5

@ Ipang: Tried that too, even without zero(0), it remains unaccepted. Thanks anyways
@ AJ.Anant: its a 'code coach' challenge

Answer 6

0 is not a multiple of 5 and 3 🙃🙃🙃

Answer 7

number = int(input())

a = range(0,number,3)
a_list = list(a)

b = range(0,number,5)
b_list = list(b)

sum_all_list = sum(set(a_list + b_list))

print(sum_all_list)

Answer 8

Shanjul Shrivastava

Can you tell which practice section it is so I can tell where is mistake.

Answer 9

@ Ipang: Tried that too, even without zero(0), it remains unaccepted. Thanks anyways
@ AJ.Anant: its a 'code coach' challenge

Answer 10

Shanjul Shrivastava

In Code Coach Challenge I found this challenge but here description is different.

https://www.sololearn.com/coach/89?ref=app

Answer 11

I have two bits of code that give exactly the same answer, one gets marked right, one wrong!
I find the test cases to be of low quality on this app and why they don't let us see them is beyond me

import numpy as np

ranger = np.array(range(1,100))

print(ranger[(ranger%3) == 0 & (ranger%5 == 0) ])

X = np.arange(1,100)

print(X[(X%3) == 0 & (X%5 == 0) ])

Answer 12

Had this problem as well but figured it out.
You should have a np.array as answer, it does not count as the right answer if you have a simple list. Answer [15 30 45 60 75 90] works and [15, 30, 45, 60, 75, 90] doesn't

Answer 13

import numpy as np

x = np.arange(1, 100)
print(x[(x%3==0) & (x%5==0)])

Answer 14

import numpy as np
x = np.arange(1,100)
print(x[(x%3==0)&(x%5==0)])