If * means adding 6 times the second number to the first number, then (1 * 2) * 3 equals · ABC26GN0215

Subject: General Aptitude · Chapter: Number System

If * means adding 6 times the second number to the first number, then $(1 * 2) * 3$ equals

(a)21

(b)31

(c)91

(d)93

Answer

Answer (as printed): B

Explanation

$(1 * 2)=1+6 \times 2=1+12=13$. $$(1 * 2) * 3=13 * 3=13+6 \times 3=13+18=31 \text {. }$$

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

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