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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

30 17 21 12 8 9 6 7 7 12 2 ?

30	17	21
12	8	9
6	7	7
12	2	?

Options

A $4$
B $5$
C $11$
D $12$

Correct answer

B. $5$

Step-by-step solution

From downwards,

(12+6+12)=30

.

(8+7+2)=17

so,

x+9+7=21

, so

x=5

.

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