The operation of addition and multiplication for rotainal numbers are - Commutative , associative , Ever rational number has a reciprocal. ( true / false) - False , Rational numbers can be represented on a number line. ( true / false) - True , The cube of 0.3 is - O. O27 , The sqaure of 6.1 is - 37.21 , Per liner equation may have any rotational number as its solution. State whether it's true and false - True , The diagonals of a rhombus bisect each other at _________ angles. - Right , Every parallelogram is not a trapezuim. ( true / false)  - False , A solid figures with only 1 vertex is a _________. - Cone , What is the formula to bring discount? - Discont = marked price - sale price , What is the formula to bring cost price ?  - Cost price = bying price + overead expenses , Side of a rombhus and it's perimeter are in _________ proportion. - Direct ,

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