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BrainTeasers Mozgalice

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*Calculate AB-C-D** Look at the series (5, A, C, 43, 73, 115, 171, D, 333, 443, 575, B, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A*B-C-D!
Can you replace the question mark with a number? MATH PUZZLE: Can you replace the question mark with a number?
Mathematical Puzzle: IF 6+4=... Mathematical Puzzle: IF 6+4=210, 9+2=711 and 8+5=313 THEN 5+2=?

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