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KERALA SAMAJAM MODEL SCHOOL
Mathematics Worksheet I - 2017 – 18
Date of submission: 17th April, 2017
Class: VII
Q.1
Represent the following sets using the Roster method:
a.
The set of whole numbers between 20 and 25.
b.
The set of letters in the word MATHEMATICS
c.
{ x : x is divisible by 5 and 6 and x ≤ 30 }
d.
{ x : x = 2n – 1, n ∈ N and n ≤ 7 }
Q.2
Represent the following sets using the set builder method:
a.
{ a,e,i,o,u}
b.
{ 9,18,27,…….,99 }
c.
{ 4, 9, 16,25,36}
d.
{-9, -6, -3, 0,3, 6, 9 }
Q.3
Identify finite, infinite, empty and the singleton sets among the following:
a.
Set of odd numbers divisible by 2
b.
Set of even prime numbers
c.
{ x: x is right angle in an acute angled triangle}
d.
The set of positive integers greater than 100
e.
{ x:x is an obtuse angle in a scalene triangle}
f.
The set of letters in the English alphabet
Q.4a
Write all the proper sub sets of the following set A = {r,s,v}
Q.4b
Also find the number of sub sets of set A.
Q.5.
Which of the following pairs of sets are equivalent / equal
a.
C={ x,y,z}
b. G={x:x is a multiple of 10}
c.
D={1,2,3}
d. H={10,15,20,25,20)
Q.6.
U = {x:x ∈ to W and x ≤ 10} A={0,1,3,5}
B = {y:y ∈ to N and 2≤ y ≤ 7 } Find the following:
a. A'
b. B'
c. AUB
d. A∩B
e. A'∩B'
f. n (AUB)'
Q.7.
Find the simple interest on ₹ 4000 at 7.5% per annum for 3 years 3 months. Also find the amount
Q.8.
Find the rate of interest when ₹ 800/- fetches ₹ 130/- as SI in 2 years 6 months
Q.9.
How long will it take for ₹ 5660/- invested at 10% per annum SI to amount to ₹ 7641/-
Q.10. What some of money will yield ₹ 170.10 as SI in 2 years 3 months at 6% per annum
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www.ksms.ac.in/maths
KERALA SAMAJAM MODEL SCHOOL
Mathematics Worksheet I - 2017 – 18
Class: VII
Date of submission: 17th April, 2017
HOTS
a. Represent the following sets using the set builder method
i)
{ 1,-1}
ii)
{1/3, 1/5, 1/7 ……..1/15}
b. How long will it take for a certain sum of money to triple itself at 13 1/3 % per annum SI.
2|Page
www.ksms.ac.in/maths