Hello, I have a doubt. with the second method if I multiple 25X2 only this will give me 50 which is 1 zero only. in this method I will only get 5 zeros as total, which is also an option given. how can I check that I have done it incorrectly. can you do a video on first method in which we can understand the "why" concept. it hard to understand without the concept background.
Hi, we will try to add the concept videos. There are quite a few lessons on algebra, statistics, geometry, and a few sequences and number properties lessons in our playlists. In the meantime, check them out. You can also sign up as a trial user on wzko.in/pro and access more content videos for free.
Thanks Baskar ! I solved the question using exactly the 2 approaches you solved.
this sir has amazing teaching skills thanks a lot
Many thanks for the feedback! :)
Wishing you the best for your GMAT Prep! 🚀
2nd approach t Dr, what if in the 3rd one i did 15*2=5*2*3 on trailing zero instead of 15*4
15 * 4 was used because 2 was already multiplied with 5. You can swap and multiply 5 by 4 and 15 by 2 - the answer will be the same.
Hello, I have a doubt.
with the second method if I multiple 25X2 only this will give me 50 which is 1 zero only. in this method I will only get 5 zeros as total, which is also an option given. how can I check that I have done it incorrectly. can you do a video on first method in which we can understand the "why" concept. it hard to understand without the concept background.
Hi, we will try to add the concept videos. There are quite a few lessons on algebra, statistics, geometry, and a few sequences and number properties lessons in our playlists. In the meantime, check them out. You can also sign up as a trial user on wzko.in/pro and access more content videos for free.
I checked using excel, 25! has 12 trailing zeroes, not 6.
1551121004 3330985984 000000 is the value of 25!
The number of trailing zeroes is 6.
It has 6