Given that 1+2+3+4+ .+10=55, then the sum 6+12+18+24+ .+60 is equal to

ABC26GN0223 · Number System

Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:

Given that $1+2+3+4+\ldots .+10=55$, then the sum $6+12+18+24+\ldots .+60$ is equal to

(a)300

(b)330

(c)455

(d)655

Answer

Answer (as printed): B

Explanation

$$\begin{aligned} & (6+12+18+24+\ldots . .+60)=6 \times(1+2+3+4+\ldots \ldots \ldots+ \\ & 10)=6 \times 55=330 . \end{aligned}$$

Explanation as extracted from the printed page; notation may be imperfect.