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## MATHEMATICAL CROSSWORD PUZZLES

ACROSS
1. Nine minus six. Its half is eighteen. Twenty-nine times three. Faces in a triangular prism.
2. In Roman numerals is LIII. Its half is seven.
3. Ninety-seven plus 501, plus thirty-six. 20% of fifteen. Three times 220 plus 107.
4. 320000 divided by 10000, plus thirty-five. 279 times two, minus fifty-two. 973 minus 902.
5. In Roman numerals is XXIV. Nine plus 106, minus thirty-seven.
6. In Roman numerals is XXXV. Thirty-five times twenty, plus seventy-eight. In binary representation is 11100.
7. 392 plus 412. 3% of 100. Sixty times seven, minus seventeen.
8. Thirty-eight times two, minus five. 360 divided by eighteen, plus forty-seven.
9. The fourth positive even integer. In binary representation is 1010. 50% of 106. Sides in a hexagon.

DOWN
1: Six divided by two. Thirty plus eighty-two, minus forty-six. Two to the power five plus six. Six and two.
2: Its half is eighteen and one half. It's the double of 25.
3: 105 plus 249. 2% of one hundred. 514 minus forty-three.
4: Nineteen plus forty-four. 742 minus 656, plus 461. Three times six minus eight.
5: It's the double of fifteen. Forty-five plus eighteen, plus ten.
6: Nine squared. 0,678 times one thousand. 356 minus 291.
7: 8360 divided by ten, minus eighty-nine. 32 divided by four. 138 plus 238, plus ninety-seven.
8: 879 minus 812. Five times three, plus five.
9: Points in a pentagram. Fifty-eight plus thirteen. 185 minus 156, plus fifty-four. In Roman numerals is VI.