exam Maths Puzzle Numerical Ability

what is the number in the series
5,25,61,113,181
plss help fast
pls dont use algbra to explain
thanks

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exam Other Question

Please help me solve this problem:
x+1 divided by x-1 is greater than or equal to 0 Find the value of m in the equation y=mx+3, such that (-2,5) is on the graph.