Current Affairs 2nd Class

Formation of Short Sentences From Jumbled Words

Formation of Short Sentences From Jumbled Words A sentence is a group of words. It is meaningful. Some sentences have verbs in them. For example: I was sleeping. Some sentences do not have verbs in them. For example: What a beautiful dress! In a sentence, words are put in the correct order. For example: My name is Timmy When the words are not in the correct order, then the sentence becomes jumbled. For example: Timmy name my is.

Catgeory: 2nd Class

Ones, Tens, Hundreds and Thousands

Ones, Tens, Hundreds and Thousands Identifying Ones and Tens In any number, first number from the right is called ones and second number from the right is called tens. The place value of digit at tens is obtained by multiplying the number by 10.

Example:

What is the place value of 6 in the number 67? (a) 60 (b) 10 (c) 70 (d) All the above (e) None of these Ans. (a) Explanation: 67 = 6 tens + 7 ones. Therefore place value of 6 is 60.

Example:

A four digit number is 23 less than the four digit greatest number. What will be the digit at tens place? (a) 6 (b) 7 (c) 5 (d) All the above (e) None of these Ans. (b) Explanation: Four digit greatest number is 9999. Required number is 9999 - 23 = 9976. Digit at second place from right is 7. Therefore, option (b) is correct. Identifying Hundreds in a Number For the identification of hundreds in a number, the number should be of three or more digits. To obtain the place value of digit at hundreds place, the digit is multiplied by 100. more...

Catgeory: 2nd Class

Addition

Addition Addition is the method by which we can add two or more quantities. Therefore; in an addition two or more numbers are involved. Before knowing the rules of the addition, look at the following. Let us add: 5 + 9

Therefore, 5 + 9 = 14

Example:

How many erasers are there in all, if a boy has 6 erasers and his sister has 8 erasers? (a) 14 erasers (b) 19 erasers (c) 21 erasers (d) All the above (e) None of these Ans. (a) Explanation: Total number of erasers = 6 + 8 = 14. Therefore, option (a) is correct,

Example:

There are 4 mango tree in each row in a mango garden. How many mango trees are there in all, if 4 rows are there in a garden? (a) 18 (b) 16 (c) 15 (d) All the above (e) None of these Ans. (b) Explanation: Total number of mango trees = 4 + 4 + 4 + 4 = 16. Therefore, option (b) is correct. Rules for Addition The following are the rules for the addition of more than one digit numbers. more...

Catgeory: 2nd Class

Subtraction

Subtraction Subtraction of Two Numbers When one quantity is taken away from another, the result is called subtraction or difference.

Example:

87 - 69 = 18

Subtraction of Three Numbers Remember the steps for the subtraction: Step I: Add the numbers having '-'(minus) sign and write the result with-sign. Step II: Add the numbers having ?+? (plus) sign and write the result with + sign. This method is applied when addition and subtraction are given. Simultaneously. Step III: Finally subtract the numbers.

Example:

\[[\,45\,]-[\,33\,]-[\,2\,]=[\,10\,]\] Trick: Step I: \[[\,33\,]+[\,2\,]\]

Step II: is not applicable here. Step III:

NOTE: This method goes same for any subtraction. No matter, how many numbers are involved in the given subtraction problem. In another words this method is applied for the subtraction of 2 numbers; 3 numbers; 4 numbers; 5 numbers and so on. Subtraction of Four Numbers Let's understand it through an example:

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Catgeory: 2nd Class

Multiplication and Division

Multiplication and Division Multiplication by Repeated Addition Multiplication is the repeated addition. Multiplication of 5 and 4 is written as 5 \[\times \] 4 = 5 + 5 + 5 + 5 = 20. Let?s understand this through an example:

Example:

There are two paper boxes of oranges each contains 24 oranges. How many oranges are there in all? 24 \[\times \] 2 = 24 + 24 = 48. Therefore, total oranges in both the boxes will be 48. Multiplication of Two Numbers The following are the steps for the multiplication of two numbers. For example multiply 12 and 2. Step I: Write down the numbers to be multiplied in columns as shown below:

Step II: Multiply ones as below: 2 Ones \[\times \] 2 = 4 Ones It is written as:

Step III: Multiply tens as shown below: 1 tens \[\times \] 2 = 2 tens Write 2 under tens column. \[\begin{matrix} T & O \\ 1 & 2 \\ \times & 2 \\ {} & 4 \\ \end{matrix}\] Therefore the product of 12 and 2 = 24 more...

Catgeory: 2nd Class

Comparison

Comparison Comparison of Numbers Comparison is required to find the greater, smaller and equal numbers among the given numbers. The common symbols for the comparison are; > is called 'greater than'; < is called less than/; = is called equal sign.

Example:

Compare the given numbers and put suitable symbol between them. 5 kilometres ________ 4090 (a) > (b) < (c) = (d) All the above (e) None of these Ans. (a) Explanation: 5 km = 5 \[\times \] 1000 metre = 5000 metres. Therefore, option (a) is correct. Rules for Comparison 1. A three digit number is always greater than a two digit number. 2. If two numbers have the same number of digits, then digits on the extreme left are compared and in this case, the number with greater digit is bigger. 3. If two numbers have the same number of digits and the extreme left digits are the same, then the second digit from the left side are compared and the process goes on.

Example:

Which one of the following is not correct? (a) 556 > 567 (b) 554 < 555 (c) 598 = 598 more...

Catgeory: 2nd Class

Time and Calendar

Time and Calendar Hours, Minutes and Seconds Hour, minute and second are the unit for the measurement of time. 24 hours = 1 day; 1 hour = 60 minutes; 1 minute = 60 seconds; Hence, 1 hour = 60 \[\times \] 60 = 3600 seconds.

Example:

Convert 5 hours in (a) 18000 seconds (b) 19000 seconds (c) 21000 seconds (d) All the above Ans. (a) Explanation: 1 hour = 60 \[\times \] 60 seconds = 3600 seconds. So 5 hours = 5 \[\times \] 3600 seconds = 18000 seconds. Clocks Clocks are the devices for measuring and indicating time. See the examples given below:

The small hand in a clock is for hour and the big hand is for the measurement of minute.

Example:

Hour hand of a clock is at 3 and minute hand is at 4 then the time will be: (a) 3 : 20 (b) 3 : 50 (c) 3 : 10 (d) All the above (e) None of these Ans. more...

Catgeory: 2nd Class

Units and Money

Units and Money Units of Money Unit of money is rupees and paise ` 1 = 100 paise ` 2 = 200 paise ` 5 = 500 paise Identification of Money Coins

Notes

Example:

Add the value of the given notes. (a) ` 36 (b) ` 35 (c) ` 45 (d) ` 55 (e) None of these Ans. (b) Explanation: Total amount = ` (20 + 10 + 5) = ` 35

Example:

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Catgeory: 2nd Class

Geometrical Figures

Geometrical Figures Line Let's see the lines given below:

Example:

Give the name of all slant lines from the figure given below.

(a) AD and BC (b) AB and BC (c) AB and AD (d) All the above (e) None of these Ans. (a)

Example:

Which one of the following is correct about the line? (a) A straight line is measured by ruler. (b) A straight line cannot be measured by ruler (c) A straight line is measured in grams, (d) All the above (e) None of these Ans. (a) Note: We use ruler to measure a straight line. Angle An angle is formed at the meeting point of two lines or an angle is formed when two lines meet. The point where two lines meet is called vertex. See the figures given below:

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Catgeory: 2nd Class

Measurement

Measurement Measurement of Length There are various units for the measurement of the length. These are metre, centimetres, kilometres etc. The standard unit for the measurement of the length is metre. 1 centimetre = 10 millimetres 1 metre = 100 centimetres 1 kilometre = 1000 metres

Example:

A rope is 45 centimetres long. What will be the length of the rope in millimetres? (a) 450 millimetres (b) 4500 millimetres (c) 405 millimetres (d) All the above (e) None of these Ans. (a) Explanation: 1 cm = 10 millimetres, 45 cm = 450 millimetres

Example:

What will be the length of each equal side of a triangle, if the sum of the length of its three sides is 15 cm? (a) 4 cm (b) 5 cm (c) 3 cm (d) All the above (e) None of these Ans. (b) Explanation: Each side = \[\frac{15}{3}\]= 5 cm. Conversion Between Metre and Centimetre 1 metre = 1 \[\times \] 100 = 100 centimetre 2 metres = 2 \[\times \] 100 = 200 centimetres 100 metres more...

Catgeory: 2nd Class

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