CBSE Class 4 Maths Revision Worksheet Set 03

Question. Every point on a circle is at the same distance from the ……
a. Diameter 
b. radius 
c. Circumference 
d.chord

Answer : B

Question. The entire length of a circle is its…..
a. radius. 
b. Diameter 
c. Circumference 
d.chord

Answer : C

Question. The bigger the radius,……the circle
a. smaller 
b. bigger
c. equal 
d.none of these

Answer : B

Question. A polygon with 4 sides
a. Pentagon
b. Hexagon.
c. Quadrilateral
d.Triangle

Answer : C

Question. A square has ….vertices.
a. 4. 
b. 5 
c. 6 
d.3

Answer : A

Question. Fill in the blanks:-
a. A ray has ….end point.
b. A….is the smallest shape.
C …..does not have a definite length.
d. A ….. figure starts and ends at the same point.
e. A point where two sides of a polygon meet is called a……

Answer :  a.one    b.point    c.Line/Ray    d.closed 6e.vertex

Question. Identify the following:-

Answer : Line Segment AD

Question. Write True or False:-
a. All the sides of a rectangle are equal.
b. A line segment has two end points.
c. A circle has only one diameter.
d. A circle of radius 1 cm is smaller than a circle of radius 9 cm.
e. A chord that passes through the centre of a circle is a diameter.
f. The radius of a circle is 50 cm .Its diameter ….

Answer :  a.false     b.true       c.false     d.True     e.100 cm

Question. Look at the figure and answer the following:-
a. Name the centre of the circle.
b. Count and name the diametres.
c. Name the five chords.
d. Name the radius

Answer : a.centre O     b.2,BE,CF     c.AC,CE,AE,BF,BD    d.OB

I. Fill in the blanks

Question 1. The smallest 5 digit number is _______________________
Answer: 10,000
In simple words: The smallest number that has 5 digits is 10,000.

Exam Tip: The smallest number of any digit count always starts with 1 followed by zeros.

Question 2. The smallest 6 digit number is ______________________ ( in word form )
Answer: One lakh
In simple words: The smallest 6-digit number is 1,00,000, which we write as One lakh.

Exam Tip: Read the question carefully to see if it asks for the answer in digits or in word form.

Question 3. Hundreds , tens & ones places are in ______________ period.
Answer: ones
In simple words: The ones, tens, and hundreds places all sit together in the ones period.

Exam Tip: Remember that in the Indian place value system, only the ones period has three digits; the other periods have two.

Question 4. The word form of 6,25,374 is ___________________________________________________
Answer: Six lakh twenty-five thousand three hundred seventy-four
In simple words: Read each group from left to right: 6 in lakhs, 25 in thousands, and 374 in ones.

Exam Tip: Always use a hyphen when writing compound number words like twenty-five and seventy-four.

Question 5. The expanded form of 7,80,204 is ___________________________________________________
Answer: \( 7,00,000 + 80,000 + 200 + 4 \)
In simple words: Write out the value of each non-zero digit and connect them with plus signs.

Exam Tip: You can leave out places that have a zero when writing a number in expanded form.

Question 6. The place value of 3 in 2, 34,496 is ________________
Answer: 30,000 (Thirty thousand)
In simple words: The digit 3 is in the ten thousands place, so it stands for 30,000.

Exam Tip: Do not mix up place value with face value. The face value is 3, but the place value is 30,000.

Question 7. The numeral for 2,00,000 + 40,000 + 60 + 3 is ______________________
Answer: 2,40,063
In simple words: Put zeros in the empty thousands and hundreds places when you write the full number.

Exam Tip: Always check that missing places are filled with zeros so you do not accidentally write 2463.

Question 8. Count in hundreds : 37,832 37,932 ____________________ , ______________
Answer: 38,032 , 38,132
In simple words: Add 100 to the number each time to get the next one.

Exam Tip: When you add 100 to 37,932, the hundreds turn into thousands, giving 38,032.

Question 9. Complete the pattern : 8,07,452 8,08,452 8,09,452 _______________
Answer: 8,10,452
In simple words: The number grows by 1,000 at every step. Adding 1,000 to 8,09,452 gives 8,10,452.

Exam Tip: Look at which digit changes from one number to the next to quickly spot the pattern rule.

Question 10. Compare : 8,34,903 93,093
Answer: \( 8,34,903 > 93,093 \)
In simple words: A number with 6 digits is always bigger than a number with only 5 digits.

Exam Tip: Count the number of digits in both numbers first before comparing individual place values.

II. Write true or false :

Question 1. Roman numeral ‘V’ is never repeated or subtracted. ( )
Answer: True
In simple words: In Roman numerals, you can never write V side-by-side or take it away from a larger symbol.

Exam Tip: Remember that the Roman symbols V, L, and D are never repeated and never subtracted.

Question 2. I can be subtracted from X only. ( )
Answer: False
In simple words: The symbol I can be subtracted from both V (to make 4) and X (to make 9).

Exam Tip: Keep in mind that I goes before V to write IV (4) and before X to write IX (9).

Question 3. 24 is written as XXIIII. ( )
Answer: False
In simple words: A Roman symbol cannot repeat four times. The number 24 is written as XXIV.

Exam Tip: No Roman numeral can be repeated more than three times consecutively.

Question III. Round the numbers to nearest 10.
a) 25 b) 887 c) 2573
Answer:
a) 25 rounds to 30
b) 887 rounds to 890
c) 2573 rounds to 2570
In simple words: Check the ones digit. If it is 5 or more, round up. If it is 4 or less, round down.

Exam Tip: When rounding to the nearest 10, look only at the digit in the ones place.

Question IV. Round the numbers to the nearest 100.
a) 5602 b) 1340 c) 9532
Answer:
a) 5602 rounds to 5600
b) 1340 rounds to 1300
c) 9532 rounds to 9500
In simple words: Look at the tens digit. Since 0, 4, and 3 are all less than 5, every number rounds down.

Exam Tip: To round to the nearest 100, always inspect the tens digit to decide whether to round up or down.

Question V. Build the greatest and the smallest possible 5 digit number.
a) 3 , 1 , 6 , 2 , 0
Greatest : __________________
Smallest : _________________
b) 5 , 1 , 0 , 7
Greatest : _________________
Smallest : ___________________
Answer:
a) Given digits: 3, 1, 6, 2, 0
Greatest : 63,210
Smallest : 10,236
b) Given digits: 5, 1, 0, 7
Greatest : 77,510
Smallest : 10,057
In simple words: Put digits from biggest to smallest for the greatest number. For the smallest number, put them from smallest to biggest, but never begin with 0. Repeat the needed digit when only 4 digits are given.

Exam Tip: A number cannot start with zero, so put the smallest non-zero digit first when forming the smallest number.

Question VI. Fill the boxes
 

Answer:
 

In simple words: Match each Roman numeral to its ordinary number: L is 50, XXIX is 29, XIV is 14, XXXV is 35, M is 1000, and XIX is 19.

Exam Tip: Memorize the basic key values: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, and M = 1000.

Question VII. Arrange the numbers in ascending order:
35,201    35,210    35,102    35,120
Answer: 35,102, 35,120, 35,201, 35,210
In simple words: Ascending order means placing numbers in order from lowest to highest.

Exam Tip: Compare the hundreds digit first; if they match, look at the tens digit to set the order.

Question VIII. Arrange the numbers in descending order :
98,432    98,342    9,892    98,243
Answer: 98,432, 98,342, 98,243, 9,892
In simple words: Descending order means arranging numbers starting from the largest down to the smallest.

Exam Tip: The 4-digit number 9,892 is smaller than all the 5-digit numbers, so it comes last.

IX. Answer the following:

Question 1. Find the sum of place values of 2 in 32,278.
Answer:
Place value of first 2 (thousands place) = 2,000
Place value of second 2 (hundreds place) = 200
Sum = \( 2,000 + 200 = 2,200 \)
In simple words: Write the value of each 2 and add them together to get 2,200.

Exam Tip: Write down each place value step-by-step before calculating their sum.

Question 2. Find the difference of place values of 7 in 72,507.
Answer:
Place value of first 7 (ten thousands place) = 70,000
Place value of second 7 (ones place) = 7
Difference = \( 70,000 - 7 = 69,993 \)
In simple words: Find both values of 7 and take away 7 from 70,000 to get 69,993.

Exam Tip: Regroup carefully across zeros when subtracting 7 from 70,000.

Question X. Answer the following :
Numeral : ___________________
Number name : _________________________________________________________________
Expanded form : __________________________________________________________________
Answer:
Numeral : 7,31,506
Number name : Seven lakh thirty-one thousand five hundred six
Expanded form : \( 7,00,000 + 30,000 + 1,000 + 500 + 6 \)
In simple words: Count the beads on each spike: 7 lakhs, 3 ten thousands, 1 thousand, 5 hundreds, 0 tens, and 6 ones.

Exam Tip: Notice that the tens spike is empty, so place a 0 in the tens position of the numeral.

Question XI. Write the numeral for the following:
a) 3,00,000 + 6000 + 70 ______________________
b) Five lakh sixteen thousand seven______________________
Answer:
a) 3,06,070
b) 5,16,007
In simple words: Write each number in standard form, putting 0 in any missing place value.

Exam Tip: Check your digits place-by-place against the place value chart to make sure no zeros are skipped.

Challenge Questions:

Question 1. This clock is broken into 3 pieces such that the numerals on each part add upto the same number .
Show how it has broken.
Answer:
The total sum of numbers 1 to 12 is:
\( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 = 78 \)
Since the clock breaks into 3 pieces with equal sums, each piece must total:
\( 78 \div 3 = 26 \)

The clock is broken into three parts along two parallel lines:
Part 1: XI + XII + I + II = \( 11 + 12 + 1 + 2 = 26 \)
Part 2: IX + X + III + IV = \( 9 + 10 + 3 + 4 = 26 \)
Part 3: VII + VIII + V + VI = \( 7 + 8 + 5 + 6 = 26 \)
In simple words: The numbers on the clock add up to 78. Dividing 78 into 3 equal pieces gives 26 for each piece.

Exam Tip: First add all 12 numbers and divide by 3 to find the target total for each piece before trying combinations.

Question 2. There are 4892 tens in a number. How many thousands are there in the same number ?
Answer:
Value of the number = \( 4892 \times 10 = 48,920 \)
Number of thousands = \( 48,920 \div 1,000 = 48.92 \)
This means there are 48 whole thousands (and 920 ones remaining).
In simple words: Multiply 4892 by 10 to get 48,920. Then divide by 1,000 to see that there are 48 thousands in it.

Exam Tip: Multiply by 10 first to find the complete number, then divide by 1,000 to get the thousands.