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What is the 21st term of the sequence 100, 95, 90, 85....?

10
20
0
5
Explanation:

Arithmetic Progresson series

$t_{n}=a+(n-1)d=l$

a=100, n=20, d=-5

$ t_{n}=(100)\times(20)\times(-5)$

=100-100

=0
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