Question

1+3+5+7+9+11+13+15+17+19+21+23
without adding find the sum of the following sets of odd number ​

Answer 1

Answer:

Sum can be found by AP Method

$( \frac{n}{2} ) \times (a + l)$

$( \frac{12}{2} ) \times (1 + 23)$

$6 \times 24$

= 144

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