(a) Cobalt CO is incorrect.The correct symbol is Co. (b) Carbon c is incorrect.The correct symbol is C. (c) Aluminium AL is incorrect.The correct symbol is Al. (d) Helium (He) is correct. (e) Sodium So is incorrect.The correct symbol is Na.

To do: We have to write shaded portion as fraction and arrange them in ascending and descending order using correct sign $‘’$ between the fractions.Solution:(a) There are eight parts in the first circle and 3 parts are shaded.Therefore, The fraction representing the shaded portion $= \frac{3}{8}$There are eight parts in ... Read More

To do:We have to write the fractions and pair up the equivalent fractions from each row.Solution:(a) There are two parts in total and 1 part is shaded.Therefore, The fraction representing the shaded portion $=\frac{1}{2}$(b) There are six parts in total and 4 parts are shaded.Therefore, The fraction representing the shaded ... Read More

To do :We have to express the given numbers as mixed fractions.Solution:(a) $3)20(6$    $18$-----------    $2$-----------Therefore, $\frac{20}{3}=\frac{3\times6+2}{3}$$=6\frac{2}{3}$(b) $5)11(2$    $10$-----------    $1$-----------Therefore, $\frac{11}{5}=\frac{5\times2+1}{5}$$=2\frac{1}{5}$(c) $7)17(2$    $14$-----------    $3$-----------Therefore, $\frac{17}{7}=\frac{7\times2+3}{7}$$=2\frac{3}{7}$(d) $5)28(5$    $25$-----------    $3$-----------Therefore, $\frac{28}{5}=\frac{5\times5+3}{5}$$=5\frac{3}{5}$(e) $6)19(3$    $18$-----------    $1$-----------Therefore, $\frac{19}{6}=\frac{6\times3+1}{6}$$=3\frac{1}{6}$ (f) $9)35(3$    $27$-----------    $8$-----------Therefore, $\frac{35}{9}=\frac{9\times3+8}{9}$$=3\frac{8}{9}$ Read More

To do :We have to convert the given fractions to improper fractions.Solution :To convert a mixed fraction to an improper fraction, follow these steps:1. Multiply the whole number part by the fraction's denominator.2. Add the result to the numerator.3. Then write the result on top of the denominator keeping denominator ... Read More

To do:We have to write the fractions and find whether the given fractions are equivalent.Solution:(a)(i) There are two parts in total and 1 part is shaded.Therefore, The fraction representing the shaded portion $=\frac{1}{2}$(ii) There are four parts in total and 2 parts are shaded.Therefore, The fraction representing the shaded portion ... Read More

Given:Arya, Abhimanyu, and Vivek shared lunch. Arya has brought two sandwiches, one made of vegetable and one of jam. The other two boys forgot to bring their lunch. Arya agreed to share his sandwiches so that each person will have an equal share of each sandwich. To do:We have to ... Read More

Given:Kanchan dyes dresses. She had todye 30 dresses. She has so far finished 20 dresses.To do:We have to find what fraction of dresses she has finished.Solution:Total number of dresses Kanchan has to dye $= 30$ dressesNumber of dresses she has finished $= 20$ dressesTherefore, The fraction of dresses she has ... Read More

To do:We have to write the natural numbers from 2 to 12 and the fraction of them that are prime numbers.Solution:  Natural numbers from 2 to 12 are $2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12$Total number of natural numbers from 2 to 12 $= 11$Prime numbers from ... Read More

To do:We have to write the natural numbers from 102 to 113 and the fraction of them that are prime numbers.Solution:  Natural numbers from 102 to 113 are $102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113$Total number of natural numbers from 102 to 113 $= 12$Prime numbers ... Read More