This is a demo of Math Olympiad 4. Your next practice questions in a specific program will be specially tailored for you as the system learns from your previous practices!
 A and B are two different numbers selected from consecutive numbers starting from 7 to 21 inclusive. What is the largest value of
 A + B A − B
?
 Anne had 24 pennies and Steve had 32 pennies at the beginning. Anne gave
 1 2
of her pennies to Steve, and Steve gave
 1 4
of all the pennies he then had to Anne. After that, how many more pennies did Steve have than Anne?
 A contest contains 15 questions. The contest was graded by giving 8 points for each correct answer and deducting 4 points for each incorrect answer. Jay attempted all 15 questions leaving no question unanswered and scored a total of 36 points. How many wrong answers did Jay get?
 Ed and Ben are biking around a round trail which is 10 miles long. Ed bikes at 10 mph and Ben bikes at 8 mph. If both start from the same place and ride in the same direction, how long (in hours) will it take for them to meet again?
 There are 15 people in a team. If they will shake hands with each other only once during a meeting, how many handshakes will be made in total?
 The weight of a box is the same as 9 pounds plus the weight of
 1 10
of the box. How many pounds does the box weigh?
 If a number is divisible by 4 and 6, is the number also divisible by 24 for sure?
Yes No
 The sum of the ages of Sofia and Niconia is 13, the sum of the ages of Sofia and Jessica is 15 and the sum of the ages of Niconia and Jessica is 12. How old is Niconia?