Directions How to Answer

Aptitude Test Topic: Clock and Calendar

Finding the time when the angle between the two hands is given. or Finding the angle between the two hands at a given time.

Directions

Concept of Clocks

  • Type 1: Finding the time when the angle between the two hands is given.
  • Type 2: Finding the angle between the 2 hands at a given time.
  • Type 3: Questions on clocks gaining/losing time.

We will cover the first two types in this Lecture.

Important Points

  • A clock is a complete circle having 360 degrees. It is divided into 12 equal parts i.e. each part is 360/12 = 30°.
  • As the minute hand takes a complete round in one hour, it covers 360° in 60 minutes.
  • In 1 minute it covers 360/60 = 6°/ minute.
  • Also, as the hour hand covers just one part out of the given 12 parts in one hour. This implies it covers 30° in 60 minutes i.e. ½° per minute.
  • This implies that the relative speed of the minute hand is 6 - ½ = 5 ½ degrees.
  • We will use the concept of relative speed and relative distance while solving problems on clocks.

Some facts about clocks:

  • Every hour, both the hands coincide once. In 12 hours, they will coincide 11 times. It happens due to only one such incident between 12 and 1'o clock.
  • The hands are in the same straight line when they are coincident or opposite to each other.
  • When the two hands are at a right angle, they are 15-minute spaces apart. In one hour, they will form two right angles and in 12 hours there are only 22 right angles. It happens due to right angles formed by the minute and hour hand at 3’o clock and 9'o clock.
  • When the hands are in opposite directions, they are 30-minute spaces apart.
  • If both the hour hand and minute hand move at their normal speeds, then both the hands meet after 65 5/11 minutes.

To give the answer click/tap the option alphabet for your answer choice. for correct answer green check and for wrong answer a red cross will appear along with a button to show explanation with or without video of the question answer.

Clock and Calendar: Clock Practice MCQ

Question Statement:

A clock when seen in a mirror shows 11:25. What is the correct time?

1:25
12:35
1:35
12:25

Explanation:

Correct Answer: B

Shortcut is to subtract the given time from 11:60 (As mentioned in key Point N). Thus the correct time is 11:60 – 11:25 = 0:35 and 0:35 mean 12:35 So, Answer is 12:35.

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Question: 1   Test: 2 of 4 Next Test

Tests

You are taking Aptitude Test No. 2

Each aptitude test is comprised of 10 except the last test which might have fewer than 10 in some topics.

You are at question (MCQ) number 1 and Test Number 2 of Clock and Calendar: Clock. To deal with Clock and Calendar questions, you must take lesson on the subject. In case of science and Art subjects revise your text books and in case of general aptitude topics take lessons from the topic page.

The question:

A clock when seen in a mirror shows 11:25. What is the correct time?

.... with options: 1:25, 12:35, 1:35, 12:25 can be solved with the concepts and understanding of Clock and Calendar.