self Maths Puzzle

What is the value of the 201st
term of asequence if the first term of the sequence is2 and each successive term is 4 more thanthe term immediately preceding it?

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self Other Question

The product of two numbers a and b equals one-quarter their average. What is a in terms of b? I CAN SEE I LORRY WHEN PER MINUTE.WHEN I AM RUNNING AT 60KMPH IN OPPOSITE DIRECTION,HOW MANY LORRIES CAN I SEE IN ONE HOUR?