Page 35 - PlayFacto_S4
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Opening lockers
There are fifity closed lockers in a classroom, all numbered from 1 to
50. Each locker is designated by student attendance numbers. Fifty
students will follow the below methods to open closed lockers, close
opened lockers, and to find the locker numbers that are finally left open.
1. Student with a attendance number 1 opens all lockers.
2. Student with a attendance number 2 opens all lockers that are
multiples of 2.
3. Student with a attendance number 3 closes all opened lockers and
opens all closed lockers that are multiples of 3.
4. All the remaining students either close all opened lockers and open
all closed lockers based on the multiples their attendance number.
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
32 Workbook S-4
There are fifity closed lockers in a classroom, all numbered from 1 to
50. Each locker is designated by student attendance numbers. Fifty
students will follow the below methods to open closed lockers, close
opened lockers, and to find the locker numbers that are finally left open.
1. Student with a attendance number 1 opens all lockers.
2. Student with a attendance number 2 opens all lockers that are
multiples of 2.
3. Student with a attendance number 3 closes all opened lockers and
opens all closed lockers that are multiples of 3.
4. All the remaining students either close all opened lockers and open
all closed lockers based on the multiples their attendance number.
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
32 Workbook S-4
