Question

If \[ 1+3+5+\cdots+l_1=1521 \] and \[ 2+4+6+\cdots+l_2=1722, \] then $l_1+l_2=$

• A. 160
• B. 159
• C. 80
• D. 79

Hint:

Memorize: \[ 1+3+5+\cdots +(2n-1)=n^2 \] and \[ 2+4+6+\cdots+2n=n(n+1). \] These formulas frequently appear in objective examinations.

Answer 1

The Correct Option is B