Revision on Algebra
1. If a=5,b=6 then find the value of (a) (a+b)(a-b) (b) 5(a+b) (c)
(axb)xc=ax(bxc)
2. Harsha’s
score in Mathematics is 15 more than three-fourth of her score in science.If
she score x marks in science,find her score in mathematics.
3. Solve
3y +2 =11 and verify your answer
4. . Ramu is 3 times as old as Bhima and Bhima is 5 years older
than Krishna . If Bhima age is 15 years now then find a) Find the sum of ages of Ramu and Krishna (b)Find the sum of ages of Ramu and Bhima 3
years ago
5. If Meera’s presented age is x years determine
a) Meera’s
age 3 years ago
b)Meera’s
grandfather’s age which is 6 times her age .
c) Meera’s
father’s age is 5 years more than 3 times her age .What is her father’s age.
d)Meera’s
age is 5 years from now
e)Meera’s
grandmother is 2 years younger than her grandfather.What is grandmother’s age?
6. The
length of an edge of a cube l .Find the formula for the sum of lengths of all
the edges of the cube.
7. Write
expressions for the following
(a)
7 added to p (b)11
subtracted from 2m
© -p divided by 5 (d)Y is multiplied by -8 and then 5 is
added to the result
(e)
6 more than thrice a number x. (f)3
less than quotient of x by y/
8.A
cuboidal box has height h cm. Its length is 5 times the height and breadth is
10cm less than the length. Express the length and the breadth of the box in
terms of height
9.
Pick the solution from the values from the values given in the bracket next to
the equation .Show that the other values
do not satisfy the value:
(i)
x+7=3 (3,4,-4,-7)
(ii) 3y-2 =16
(3,6,9,2)
10.Change
the following statement using expressions iinto statements in ordinary language
(a)
a note book cost rs p.A book costs rs 3p.
(b)
The total number of students in the school is 20 times that of our classes
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