BAIS Math Olympiad Semifinal Round

The solid below is made up of cubes. How many cubes are required to make the given

Solid?

• 14

• 16

• 18

• 19

Seven consecutive odd numbers add up to 105. What is the largest of these numbers?

Calculate:

3 km + 1100 m + 70 dm (convert the final answer to meters)

• 1173 m

• 1470 m

• 1470 m

• 4107 m

The mathematician Archimedes was born 287 B.C. (before Christ). He was 75 years old.

In which year he died?

• 202 B.C

• 212 B.C

• 222 B.C

• 352 B.C

In a club there are three categories of members: juniors, adults and seniors. The ratio between juniors and adults is 3: 2. The ratio between adults and seniors is 2:3.

From the given possible options, How many members does the club have the least?

• 64

• 69

• 73

• 78

Calculate:

5-(1-(4-(2-3)))

• -13

• 1

• 9

• 7

Tim’s mother checks his room every evening. For each day she finds his room cleaned up he gets 4 € at the end of the month. For each day Tim’s room is not cleaned up, he has to pay 1 € at the end of the month. How many times Tim has to clean up his room in order to pay nothing at the end of the month (30 days)?

• 5-times

• 6-times

• 7-times

• 10-times

Seven friends meet. Everyone shakes hands with each other once.

How many handshakes are there in total?

• 21

• 28

• 36

• 42

Which number belongs to the numeral onehundredandtwothousandonehundredandtwo?

•  12102 

•  10212 

• 102102

• 120102

Anne and Bernd play a game. They agree that for each game the winner gets 3 points and the loser gets 1 point. In the end, Anne has won exactly four games and Bernd reached 10 points. How many times have the played the game?

• Five times

• Six times

• Seven times

• Eight times