exam Maths Puzzle Numerical Ability

What is the remainder if 7x53 - 3x31 + 19x3 - 13 is divided by x + 1?

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exam Other Question

a coin purse contains 3 quarters 6 dimes 2 nickles and 4 pennies. what is the probablity of randomly selecting a dime?
thank you so much!
:) Hi I just want someone to check to see if I did this right.

Quadratic equation

4x cubed -36x=0

4x (x squared -9) = 0

4x (x-3)(x+3) = 0

x=3 , x=-3 , and x=0

Is this right?

Thanks you