Mathtips

black_arabian_stallion_by_vikarus-d33e5pn

 

Solution for yesterday’s problem

Let the first prize be ‘x’; the other prizes are x-20, x-40, x-60, x-80, x-100, x-120; sum of these seven prizes= 7x-420 = 700

=>x = 160

Today’s problem

Which term of the arithmetic progression: 121, 117, 113, …. is its first negative term?

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