Math challenge 2nd stage

In which shape is exactly one half coloured grey?

• A

• B

• C

• D

• E

FIND THE ANSWER

• 7

• 44

• 25

• 8

Which order cannot be obtained, if only two cards are swapped?

• 2710

• 0127

• 1027

• 0217

• 2071

How many Natural numbers lie between 2,009 und 23,03?

• 20

• 23

• 21

• 25

Byron is 5cm taller than Aaron, but 10cm shorter than Caron. Darren is 10cm taller than
Caron, but 5cm shorter than Erin. Which of the following statements is true?

• Aaron and Erin are equal heights

• Aaron is 10cm taller than Erin

• Aaron is 10cm shorter than Erin
  

• Aaron is 30cm taller than Erin

• Aaron is 30cm shorter than Erin

As soon as he left his city towards Caecá, Charles saw the sign on the left. When he came back from Caecá, he saw the sign on the right. At that point, how far was it to get to his city?

• 12 km

• 21 km

• 29 km

• 41 km

• 52 km

In each of the four corners of a swimming pool, 10 m wide by 25 meters long, there is a child. The swimming instructor is sitting almost in the middle of one of the edges of the pool. When he calls the children, they all choose the longest path along the edges to reach the instructor. What was the sum of the distances covered by the four children?

• 90 m

• 120 m

• 140 m

• 160 m

• 210 m

???

• A

• B

• C

• D

• E

Miguel solves six Olympiad problems every day and Lázaro solves four Olympiad problems every day. How many days does it take Lázaro to solve the same number of problems as Miguel solves in four days?

• 4

• 6

• 7

• 8

• 5

Kanga wants to multiply three different numbers from the following list: –5, –3, –1, 2, 4, and 6. What is the smallest result she could obtain?

• -120

• -200

• -90

• -48

• -15