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Question 11 Mark
Leela is Radha's younger sister. Leela is $4$ years younger than Radha. Can you write Leela's age in terms of Radha's age? (Assuming Radha's age to be $x$ years)
Answer
Let, Radha's age be $x$ years s.As, Leela is younger than Radha by $4$ years.
So, Leela's age $= (x-4)$ years.
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Question 21 Mark
A bird flies $1$ kilometre in one minute. Can you express the distance covered by the bird in terms of its flying time in minutes$?$ (Use t for flying time in minutes.)
Answer
Distance covered by the bird in $1$ minute $= 1$ kilometre.
So, the distance covered by the bird in $t$ minutes $= 1 \times t = t$ kilometers.
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Question 31 Mark
We already know the rule for the pattern of letters $L, C$ and $F.$ Some of the letters from $Q.1$ (given above) give us the same rule as that given by $L.$ Which are these$?$ Why does this happen$?$
Answer
We know that $T$ require only two matchsticks. So, the pattern for letter $T$ is $2n.$ Among all the letters given in question $1,$ only $T$ and $V$ are the letters which require two matchsticks. Hence, $(a)$ and $(d).$
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Question 41 Mark
Find the rule which gives the number of matchsticks required to make the matchstick pattern. Use a variable to write the rule.
A pattern of letter $A$ as
.
Answer

From the above figure, it can be concluded that the letter A will require 6 matchsticks
Therefore, the pattern is $6n.$
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Question 51 Mark
Find the rule which gives the number of matchsticks required to make the matchstick pattern. Use a variable to write the rule.
A pattern of letter $S$ as
.
Answer


From the above figure, it can be concluded that the letter S will require 5 matchsticks
Therefore, the pattern is $5n.$
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Question 61 Mark
Find the rule which gives the number of matchsticks required to make the matchstick pattern. Use a variable to write the rule.
A pattern of letter $E$ as
Answer


From the above figure, it can be clearly seen that the letter $E$ will require $5$ matchsticks.
Therefore, the pattern is $5n.$
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Question 71 Mark
Find the rule which gives the number of matchsticks required to make the matchstick pattern. Use a variable to write the rule.
A pattern of letter $V$ as 
.
Answer

From the above figure, it can be concluded that the letter V will require $2$ matchsticks
Therefore, the pattern is $2n$
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Question 81 Mark
Find the rule which gives the number of matchsticks required to make the matchstick pattern. Use a variable to write the rule.
A pattern of letter $U$ as
.
Answer

From the above figure, it can be concluded that the letter U will require $3$ matchsticks
Therefore, The pattern is $3n$
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Question 91 Mark
Find the rule which gives the number of matchsticks required to make the matchstick pattern. Use a variable to write the rule.
A pattern of letter $Z$ as
.
Answer


From the above figure, it can be concluded that the letter Z will require $3$ matchsticks
Therefore, The pattern is $3n.$
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Question 101 Mark
Find the rule which gives the number of matchsticks required to make the matchstick pattern. Use a variable to write the rule.
A pattern of letter $T$ as
.
Answer


From the above figure, it can be observed that the letter T will require $2$ matchsticks
Hence, The pattern is $2n.$
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