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Direction: Correct the following equations by interchanging the two signs.

  1. 16 + 4 ÷ 2 - 21 x 7 = 21
    1. + and -
    2. + and x
    3. - and ÷
    4. x and ÷
    5. None of these
Correct Option: D

If we interchange the signs 'x' and '÷' the equation becomes
16 + 4 x 2 - 21 ÷ 7 = 16 + 8 - 3 = 21


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