1
2
three
four
five
...
Number of participants in the notification
1
2
four
eight
( 16)
...
Total number of people notified
1
1+2=3
3+4=7
(7+8= 15)
( 15+ 16=3 1)
...
It took (4) minutes to inform 15 students.
If there are 50 students in Class 1, Grade 6, it will take at least (6) minutes to inform everyone.