Easy Peasy
Double Them Up
Triple Jeopardy
100
There were some birds sitting on a telephone wire. At one moment, 5 of them flew away. After some time, 2 birds came back. At that time, there were 13 birds sitting on the wire. How many birds were there at the very beginning?
16
100
Cindy is 59 days older than her friend Amy. Cindy had her birthday on a Wednesday. On which day of the week will Amy celebrate her next birthday?
Saturday
200
How many white squares need to be shaded so that the number of shaded squares equals exactly to half of the number of white squares?
3
200
Girls and boys from Maria and Jason’s class have formed a line. There are 16 students on Maria’s right, and Jason is among them. There are 14 students on Jason’s left, and Maria is among them. There are 7 students between Maria and Mathew. How many students are in this class?
23
300
Which numbers are inside a triangle and inside a circle, but not a rectangle at the same time?
4 and 7
300
A lottery-ticket was 4 dollars. Three boys, Paul, Peter, and Robert, made a contribution and bought two tickets. Paul gave 1 dollar, Peter gave 3 dollars, and Robert gave 4 dollars. One of the tickets they bought was worth 1000 dollars. Boys shared the award fairly, meaning, proportionally to their contributions. How much did Peter receive?
375
400
The scales in the pictures had been balanced. There are pencils and a pen on the arms of the scales. What is the weight of the pen in grams?
7
400
A square contains 4 numbers. The sum of the numbers in the first row is 8, and the sum in row 2 is 5. The difference of the numbers in column 1 (top left square minus the bottom left square) is 2. What is the difference in column 2?
1
500
How many numbers are inside only one shape?
7
500
Adding all digits of a 10 digit number gives a sum of 9. What number is guaranteed to be at least one of the 10 digits?
0