Equation

What Makes This Equation True?

Riddle:

If 1+9+8=1, what is 2+8+9?
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A True Equation

Riddle:

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.
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Make the Equation True

Riddle:

81 x 9 = 801. What must you do to make the this equation true?
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