Free Electronic Puzzle Games that exercise your mind ready to play online!

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1: 1194 divided by two. Any number plus its opposite. 168000 divided by one thousand. 2: Three squared minus one. 0,098 times one thousand. The double of eighteen plus one. Its half is two. 3: Four cubed. 310 minus 257, plus 138. It's the double of fourteen plus one. 4: Sixty-eight plus sixteen, plus two. Four divided by four. 5% of 500. 5: In binary representation is 1000. 202 minus fourteen, minus 104. 167 minus 158, plus seventy-three. 50% of eighteen. 6: Thirty plus 121, minus eighty-eight. The fourth positive even integer. 101 minus fourteen, minus fifteen. 7: Four cubed. 657000 divided by one thousand. Fifty-three plus thirty-eight. 8: Four times two plus one. 877 minus 819. In hexadecimal representation is B. You can’t divide into this real number. 9: 858 minus 583. One cubed. Eight hundred divided by twenty-five, plus 155.


1: 4848 divided by eight, minus twenty. It's the double of four. 69200 divided by one hundred. 2: The fifth odd number. Its double is 96. Four cubed. Its half is seven halves. 3: Sixty-one times two, minus forty-three. 1174 minus 491. 55% of one hundred. 4: Eight squared plus sixteen. The second positive even integer. Sixty-three plus two, plus three. 5: Five times cero. Fifty-eight plus twenty-five, plus eight. 360000 divided by 10000, plus forty-nine. One cubed. 6: Five plus ninety-four, minus sixty-eight. Term that in Fibonacci series goes after 5. Eleven times six, plus five. 7: The seventh prime number. 2070 divided by nine, minus three. In hexadecimal representation is B. 8: Three factorial. Three cubed minus two. In hexadecimal representation is 1D. Sides in a octagon. 9: 910 minus thirty-eight, minus twenty-three. Five times three minus six. Fifty-six plus fifty-one.


  • To enter numbers choose a square by clicking on it.
  • Only one number per square is allowed.
  • Once a number is entered, the cursor will jump to the next square for your convenience. If “across” definitions are selected, the next square will be the one to the right. If “down” definitions are selected, the next square will be the one below.
  • You can use the arrow keys to move inside the crossword grid.
  • You can use the CHECK button to see if the squares have the correct letter. Incorrect letters will temporarily appear in red.
  • Click on the CLEAR button to delete the letters in all the boxes automatically.
  • Click on the NEW CROSSWORD button for play a new crossword puzzle.


  • It is better to try and do mentally the arithmetic operations in the definitions. It is true that some of them may be difficult, but just by trying you will be exercising your mind.
  • If arithmetic operations turn up to be complicated, it is better to use paper and pencil to solve them. If you use a calculator operations will be too easy, there will be no mental exercise and solving the game will be useless.
  • Searching for shortcuts or tricks for calculations is also beneficial because you will be using your memory at the same time as you employ strategies and exercise logical thinking. For example, it is easier to mentally add 1533 plus 2257 if we first do 1000 + 2000 = 3000, then 500 + 200 = 700 + the previous result = 3700, after that we do 30 + 50 = 80 + the previous result = 3780 and finally we do 7 + 3 = 10 + the previous result = 3790. You can search for more tricks or calculation techniques in Google.
  • If numbers in an operation are too long you may be able to deduce part of the result at a guess. For the rest of the digits you can use the definitions of the numbers that cross the number in question. Let’s consider, for example, 35637 minus 11894. We will immediately realise without any calculation that the first digit of the result is going to be 2 and the last is going to be 3 (2xxx3). The other three digits will be probably deduced with the definitions of the numbers that cross the number we need to find.