CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A boy with a collection of marble realise that if he makes a group of 5 or 6 marbles at a time there are always 2 marbles left. Can you explain why the boy cannot have a prime number of marbles. 


Solution

Number of marbles is 5n+2 or 6m+2 ,i.e., a multiple of 5 or 6 plus 2 marbles. Hence number of marbles must be a multiple 5x6 or 30  plus even number 2. Hence number of marbles cannot be a prime number

flag
 Suggest corrections
thumbs-up
 
3 Upvotes


Similar questions
View More


People also searched for
View More



footer-image