3 marks

Question 13 Marks

A piece of wire is ‘12s’ cm long. What will be the length of the side, if it is formed as an equilateral triangle

Answer

An equilateral triangle has 3 equal sides.Length of the wire $=$ ' $12 s$ ' $cm$
Length of each side $=\frac{12 s }{3} cm$.
Length of each side of the triangle $=4 sm$

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Question 23 Marks

A piece of wire is ‘12s’ cm long. What will be the length of the side, if it is formed as a square

Answer

A square has four equal sidesLength of the wire $=$ ' $12 s$ ' cmLength of each side $\frac{12 s }{4} cm$Length of each side of the square $3 s cm$

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Question 33 Marks

The teacher asked two students to write the algebraic statement for the verbal statement “8 more than a number”. Vetri wrote ‘8 + x’ but Maran wrote ‘8x’. Who gave the correct answer?

Answer

Let the number be x8 more than the number = 8 + xVetri gave the correct answer as 8 + x

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Question 43 Marks

Arivazhagan is 30 years younger to his father. Write Arivazhagan’s age in terms of his father’s age

Answer

Given Arivazhagan is 30 years younger to his father.Let Father’s is age be n.Arivazhagan’s age is (n – 30) years.

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Question 53 Marks

Draw the next two patterns and complete the table.

Shapes	$1^{st}$ Pattern	$2^{rd}$ Pattern	$3^{rd}$ Pattern	$4^{th}$ Pattern	$5^{th}$ Pattern
Squares	1	2	3
Circles	1	2	3
Triangles	2	4	6

Answer

Shapes	$1^{st}$ Pattern	$2^{rd}$ Pattern	$3^{rd}$ Pattern	$4^{th}$ Pattern	$5^{th}$ Pattern
Squares	1	2	3	4	5
Circles	1	2	3	4	5
Triangles	2	4	6	8	10

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Question 63 Marks

K	$3$	$6$	$9$	$12$	$15$	$18$
$\frac{k}{3}$	$1$	$2$

Answer

6
K	3	6	9	12	15	18
$\frac{k}{3}$	1	2	3	4	5

$\frac{k}{3}=5$
$k=15$

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Maths 3 marks

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