At a party, every second guest gets a pen, every fourth guest gets a wallet and every fifth guest gets a thumbdrive. What is the position of the fifth guest that will get all three gifts? Give the answer in number(s). (Eg 1)
Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Multiples of 4: 4, 8, 12, 16, 20
Multiples of 5: 5, 10, 15, 20
Position of the first guest that receives all 3 gifts
= Lowest common multiple of 2, 4, 5
= 20
Position of the fifth guest that receives all 3 gifts
= 5 x 20
= 100
Answer(s): 100
