Each square has a certain value. The sum of these values is indicated in the right of every line or under each column. What number needs to be put instead question mark?
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Go from a square to another, vertically or horizontally. Start with the bottom left square and end with the top right one. Respecting these two rules, find nine numbers which sum equals 66. How many choices are there?
Place six numbers formed by three digits bigger than 100 after number 457, in order to obtain six numbers of six digits. When this numbers are divided to 55.5 you obtain six integer numbers. What numbers needs to be put into the diagram?
Start from any corner number and put another 4 numbers, following the leads. Make a sum of those five numbers. How many times can you obtain a sum equal to 24?
Those two pair of scales are in balance. How many clubs are necessary to equilibrate the third pair of scales?
Between the numbers columns from this diagram exists a certain relation. The characters you can find above the diagram are there in order to help you. What number needs to be put into the empty squares?
Start from any corner number and put another 4 numbers, following the leads. Make a sum of those five numbers. How many times can you obtain a sum equal to 27?
You have at your disposal four drops to obtain a score equal to 51. Using this target find out how many possibilities are there to obtain this score. Start from the fact that each trial is successful and once you use 4 numbers you are not able to use them twice into the same combination, even if their order is different. How many combination are there? Already done? Then try these cool flash games at Addicting Games
Start from the central circle and pass from one circle to another tangent circle. Find 4 numbers which sum is 86. After you find a trace come back into the central circle and start it again. If you can find a trace that satisfies the rules when you trace it clock wise and reverse, that means you found 2 traces. How many different traces are there?
Start from left-down corner and go to the top-right corner, following the arrows. Totalize all the numbers on the line. If every black circle represents minus 8 points, how many times can you obtain a result equal to 155?