Maths
posted by Lynn .
John has some sweets to give to his friends. If he gives 4 sweets to his friends, he will need 2 more sweets. If he gives 7 sweets to each friend, he will need 17 sweets. How many friends does John have? How many sweets does John have?

74=3 (difference of 3 sweets given)
For a difference of 3 sweets, total sweets needed:
172=15
15 sweets need for each friend having 3 more sweet, hence the number of John friend:
15/3=5
If John give each friends 4 sweets:
5x4=20
However John is short of 2 sweets (needs 2)
202=18
Therefore, John has 18 sweets