Mathematics - Permutation & Combination Question with Solution | TestHub
The integers from 1 to 1000 are written in order around a circle. Starting at 1, every fifteenth numbers is marked (ie. 1,16,31 etc). This process is continued until a number is reached which has already been marked, then unmarked numbers are ....
Options:
Answer:
Solution:
In round all the integers, which leaves the remainder 1 when divided by 15 , will be marked Last number of this category is 991 Next number to be marked is again, second round of integers which leaves the remainder '6' when divided by 15 will be marked. Last number of this category is 996 Next number to be marked is Thus third round of integers which leaves the remainder 11 when divided by 15 , will be marked . last number of this category is 986 Next number to be marked is which is already been marked. ⇒ Marked number = 200
