Find the area of the shaded figure

Express result to the accuracy of 2 decimal.
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Correct Answers: 
17
Points: 
1

What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Category: 
Correct Answers: 
4
Points: 
7

Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Category: 
Correct Answers: 
1
Points: 
10

Calculate 18+6+20

FUNNY MATH: Calculate 18+6+20 (Author: Ruzica Pavlovic)
Category: 
Correct Answers: 
2
Points: 
9

Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Category: 
Correct Answers: 
10
Points: 
2
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