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English and Logical Reasoning Prep Guide

Exam: English and Logical Reasoning Prep Guide
Subject: Logical Reasoning
Chapter: Calendar and Clock

English and Logical Reasoning Prep Guide · Logical Reasoning · Calendar and Clock

A clock goes fast by one minute during the first hour, by two...

A clock goes fast by one minute during the first hour, by two minutes at the end of the second hour, by 4 minutes at the end of 3rd hour, by eight minutes by the end of 4th hour, and so on. At the end of which hour, will it be fast by just over sixty minutes?

Options

AFifth
BSixth
CSeventh
DEighth

Correct answer

C. Seventh

Step-by-step solution

First hour

\rightarrow 1

minute Second hour

\rightarrow 2

minutes Third hour

\rightarrow 4

minutes Fourth hour

\rightarrow 8

minutes Fifth hour

\rightarrow 16

minutes Sixth hour

\rightarrow 32

minutes Seventh hour

\rightarrow 64

minutes

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