
Numbers

Natural Numbers and Whole Numbers

Negative Numbers and Integers

Sets

Fractions and Decimals

Playing With Numbers

Ratio and Proportion

Algebra

Basic Geometrical Ideas (2D)

Understanding Elementary Shapes (2D and 3D)

Symmetry: (Reflection)

Constructions (Using Straight Edge Scale, Protractor, Compasses)

Mensuration

Data Handling
HCF and LCM
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Q1
LCM of 36 and 72 is
Marks:1Answer:
72
Explanation:
72 is the least multiple of 36 and 72 
Q2
The two numbers which have only 1 as their common factor are called
Marks:1Answer:
coprimes
Explanation:
coprimes do not have any factor except 1. 
Q3
The two numbers which have only 1 as their common factor are called
Marks:1Answer:
coprimes.
Explanation:
Coprimes do not have any other factor except 1. 
Q4
H.C.F of two numbers is
Marks:1Answer:
Explanation:
Since, Product of two numbers = L.C.M^{ }×^{ }H.C.F

Q5
Find the first five multiples of 7.
Marks:2Answer:
7 X 1 = 7
7 X 2 = 14
7 X 3 = 21
7 X 4 = 28
7 X 5 = 35
Therefore, the first five multiples of 7 are 7, 14, 21, 28, and 35.