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English and Logical Reasoning Prep Guide

Exam: English and Logical Reasoning Prep Guide
Subject: Logical Reasoning
Chapter: Chart Logic

English and Logical Reasoning Prep Guide · Logical Reasoning · Chart Logic

2 1 2 21 22 ? 1 2 5 20 23 43

2	1	2
21	22	?
1	2	5
20	23	43

Options

A $40$
B $48$
C $50$
D $36$

Correct answer

A. $40$

Step-by-step solution

\begin{aligned} & (21+1)-2=22-2=20 \\ & (22+2)-1=24-1=23 \\ & (?+5)-2=43 \\ \Rightarrow & ?=(43+2)-5 \\ \Rightarrow & ?=45-5=40\end{aligned}

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