What is the father doing now?

The mother is 21 years older than the son, and in 6 years time she will be 5 times as old as the son. What is the father doing now?
Category: 
Correct Answers: 
1
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.
Category: 
Correct Answers: 
14
Points: 
1

Calculate the number 1993

NUMBERMANIA: Calculate the number 1993 using numbers [3, 5, 3, 9, 44, 267] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
0
Points: 
10

Find the area of the shaded figure

Express result to the accuracy of 3 decimal.
Category: 
Correct Answers: 
29
Points: 
1

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: 
3
Points: 
8
Enter your answer
OK
enter your answer and press button OK
close