exam Maths Puzzle Numerical Ability

421 exceeds nine times a number by 61. What is the number?

I am confuse meaning of exceeds please help me

thanks

sree

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exam Other Question

Let f(x)--3x+1 and g(x)=x to the second power +2 Find the fallowing:

(f+g)(x)

and

(g-f)(x)

I don't understand at all. Please do these step by step.
Thank You can you please help me solve this: [(-1/2)c^2b^3a](2a^2b^2c^4)