book Maths Puzzle Numerical Ability

MCM=.....1900,2000,2100,or none of these?

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book Other Question

Please tell me if the answer is correct on the following problems. If not, would you tell the answer so I can see what I did wrong.
a. 3x^2-x^2-2x+3 divided by x+2
I came up
please help me solve the following problems.

p(t+1)= -2 solve for t I started off by multiplying.

pt +p1 = -2
pt/P = -2-p/p (/ means fraction)

t = -2-1
t =-3


t