you are taking the following test:

Grade: 7,    Subject: Math,    Topic: LCM (Least Common Multiple)
 Question 1: Find the least common multiple of 12 and 80. 280 164 224 240
 Question 2: Find the LCM of 9, 10 and 45. 90 60 54 95
 Question 3: Find the LCM of 54 and 90. 180 270 216 121
 Question 4: Find the LCM of 26 and 34. 234 446 442 421
 Question 5: Jerry has a pack of cards. If he makes group of 3 cards or group of 8 cards or group of 12 cards, no card is left over. How many cards does he have in the pack? 24 12 16 21
 Question 6: Paul has two mystery numbers in his mind. Their least common multiple is 45 and greatest common factor is 3. Which two numbers does he have in his mind? 3 and 4 9 and 15 9 and 18 6 and 20
 Question 7: Find the LCM of 36 and 100. 600 180 90 900
 Question 8: Find the least common multiple of 14,   21 and 32. 124 1,120 210 672
 Question 9: Both Maria and Katrina are taking piano classes. Maria has piano class every 3rd day and Katrina has her class on every 5th day. Which is true about their classes? They will both have a class on the 12th day. They will both have a class on the 18th day. They will both have a class on the 15th day. They will never have a class on the same day.
 Question 10: Find the LCM of 16, 25 and 40. 150 400 80 300