# Arithmetic progression - math word problems

Arithmetic Progression is just a sequence of numbers in order that the common difference of any two successive numbers is a constant value.Formula for n-th member is:

${a}_{n}={a}_{1}+(n-1)\cdot d$

Sum of n AP members:

${s}_{n}=n\cdot {\displaystyle \frac{{a}_{1}+{a}_{n}}{2}}$

#### Number of problems found: 177

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See also more information on Wikipedia.