Counting

For students of class 9-10 (age 14-16)
#Tanjeem
Posts:1
Joined:Mon Mar 15, 2021 6:09 am
Counting

Unread post by #Tanjeem » Tue Mar 16, 2021 10:25 pm

When Tanvir climbed the Tajingdong mountain, on his way to the top he saw it was raining
11
times. At Tajindong, on a rainy day, it rains either in the morning or in the afternoon; but it never rains twice in the same day. On his way, Tanvir spent
16
mornings and
13
afternoons without rain. How many days did it take for Tanvir to climb the Tajindong mountain in total?

nimon
Posts:8
Joined:Sat Mar 27, 2021 7:30 am

Re: Counting

Unread post by nimon » Sat Mar 27, 2021 7:49 am

:geek: hard question. give me a hint.

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Mehrab4226
Posts:230
Joined:Sat Jan 11, 2020 1:38 pm
Location:Dhaka, Bangladesh

Re: Counting

Unread post by Mehrab4226 » Sun Mar 28, 2021 9:57 am

nimon wrote:
Sat Mar 27, 2021 7:49 am
:geek: hard question. give me a hint.
A day comprises both a morning and an afternoon. And the order when it rained or not is not important
The Mathematician does not study math because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
-Henri Poincaré

nimon
Posts:8
Joined:Sat Mar 27, 2021 7:30 am

Re: Counting

Unread post by nimon » Wed Mar 31, 2021 9:43 pm

16+13+11=40
40/2 = 20
He climbed in 20 days .
In this 20 days it had not rained in 16 morning. So, it rained 4 times in morning. Same it rained 7 times in afternoon.
So, total 4+7=11 times is rained.

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emeryhen121
Posts:15
Joined:Fri Jul 16, 2021 6:04 pm

Re: Counting

Unread post by emeryhen121 » Wed Sep 15, 2021 12:50 pm

Since a day comprises both an afternoon and an evening, the initial task is to figure out the number of days. It is easier to do so by the provided information so that the process gets easier.
According to the information, we have 16 afternoons and 13 evenings. However, these aren't the only figures provided; there are other 11 days that he saw raining,
Hence 16+13+11= 40
Now we divide the number by 2 as the information is based on either part of the day
40/2 = 20 days
Out of these 20 days, as per the provided information, it rained for 4 days in the morning, and the rest 7 days it rained in the afternoon.
So it can be said that he spent 20 days on the hike.

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