Directions for question :
The headquarters of the Ramkrishna Mission and Ramkrishna Math founded by Swami Vivekananda, the disciple of Sri Ramkrishna Paramhansa, is located at the majestic Belur Math, on the banks of the Ganges, in Howrah. It is one of the largest philanthropic institutions of the world and a place of pilgrimage for truth seekers all over the world from different religious faiths, and has a lot of footfall on a daily basis.
In the morning session, Belur Math opens its gates to all from 6.30 am to 1.30 pm every day. Entry and exit gates open after every one hour interval from 6.30 am, that is at 7.30 am, 8.30 am, and so on till 1.30 pm. People can enter or exit the Math only at those times. At 1.30 pm all people in the Math will have to leave and the Math gets closed to re-open in the evening at 6.30 pm again.
Three types of people visit the Belur Math every day. They are a) Disciples of Sri Ramkrishna Paramhansa and Swami Vivekananda, b) Donors to the Ramkrishna Mission for their philanthropic activity, and c) Pilgrims from all class of society. It has been observed that the Disciples stay at the Math for either 3 or 4 hours, the Donors stay for either 2 or 3 hours, and the pilgrims stay for either 1 or 2 hours.
On the 22nd of August 2022, at 2.00 pm, it was observed from the records at the security counter beside the entry and exit gates that 96 Disciples, 120 Donors and 240 Pilgrims had visited the Math that day since the gates opened at 6.30 am. An incomplete record of the entry and exit of the three types of people at different times was also available as below :
Entry | Exit | |||||
Disciples | Donors | Pilgrims | Disciples | Donors | Pilgrims | |
6.30 am | 12 | |||||
7.30 am | 48 | |||||
8.30 am | 0 | 36 | 0 | |||
9.30 am | 0 | 0 | 0 | |||
10.30 am | 24 | 12 | 96 | |||
11.30 am | 0 | 24 | ||||
12.30 pm | 24 | 12 | 0 | 0 | ||
1.30 pm | 24 |
Question:
How many Disciples exited the Belur Math on 22nd August 2022 at 10.30 am ?
24
36
48
Cannot be determined
We already know that the complete data on 22nd August 2022 of the entry and exit of the 96 Disciples, 120 Donors and 240 Pilgrims at the different times when the entry and exit gates opened were as below :
Entry | Exits | |||||
Disciples | Donors | Pilgrims | Disciples | Donors | Pilgrims | |
6.30 am | x | 36 | 12 | 0 | 0 | 0 |
7.30 am | 60-x | 48 | 0 | 0 | 0 | 12 |
8.30 am | 12 | 0 | m | 0 | 36 | 0 |
9.30 am | 0 | 24 | n | a | 0 | 0 |
10.30 am | 24 | 12 | 204-(m+n) | b | 48 | 96 |
11.30 am | 0 | 0 | 0 | 60-(a+b) | 24 | 108 |
12.30 pm | 0 | 0 | 24 | 12 | 0 | 0 |
1.30 pm | 0 | 0 | 0 | 24 | 12 | 24 |
Total | 96 | 120 | 240 | 96 | 120 | 240 |
At 9.30 am, 10.30 am and 11.30 am on 22nd August 2022, a total of 60 Disciples had exited the Belur Math.
However it is not possible to conclude what the specific numbers of Disciples were at the specific times of 9.30 am, 10.30 am or 11.30 am.
Hence, the number of Disciples who had exited the Belur Math on 22nd August 2022 at 10.30 am cannot be determined.