Calculate the number 1924

NUMBERMANIA: Calculate the number 1924 using numbers [9, 5, 9, 1, 21, 106] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
4
Points: 
7

Word Association: REVOLUTION, CITY, MANIAC, EDUCATION

Word Association: REVOLUTION, CITY, MANIAC, EDUCATION
Correct Answers: 
5
Points: 
7

Calculate the number 1149

NUMBERMANIA: Calculate the number 1149 using numbers [4, 7, 6, 1, 69, 894] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
0
Points: 
10

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.
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Correct Answers: 
4
Points: 
7

Find the ratio of the areas of two squares

Find the ratio of the areas of two squares. Express result to the accuracy of 3 decimal.
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Correct Answers: 
14
Points: 
1
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