exam Maths Puzzle Numerical Ability

Add or subtract as indicated
b+b-1


2b+b^2-1

a-1+a+1

a+1+a-1

4-a-5

1-5-a

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exam Other Question

x-0.04(x-10)=96.4 What is the result of x^4+4x^3+6x^2+4x+1 divided by x+1?