Question:`108 ÷ 36` of `1/4 + 2/5 xx 3 1/4`. 

Given Expression, 

`= 108 ÷ 9 + 2/5 xx 13/4`

`= 108/9 + 13/10`

`= (12 + 13/10)`

`= 133/10`

`= 13 3/10`.

Question:`1/3 ÷ 5/3 + 1/4 xx 3/5 - 2/5` of `5/7`. 

Given Expression,

`1/2 ÷ 5/3 + 1/4 xx 3/5 - 2/5` of `5/7`

`= 1/3 ÷ 5/3 + 1/4 xx 3/5 - 2/7`

`= 1/3 xx 3/5 + 3/20 - 2/7`

`= 1/5 + 3/20 - 2/7`

`= (4 + 3)/20 - 2/7`

`= 7/20 - 2/7`

`= ((49 - 40)/(140))`

`= 9/140`.

Question:`3.5 ÷ 0.7` of `7 + 0.5 xx 0.3 - 0.1` 

Given Expression ,

`= 3.5 ÷ 4.9 + 0.5 xx 0.3 - 0.1`

`= 3.5/4.9 + 0.15 - 0.1`

`= 5/7 + 15/100 - 1/10`

` 5/7 + (15 - 10)/100`

`= 5/7 + 5/100`

`= 5/7 + 1/20`

`= ((100 + 7)/(140))`

`= 107/140`

`= 0.764`

Question:`2 - [3 - {6 - { (5 - bar4 - 3) } ]` 

Given Expression ,

` = 2 - [3 - { 6 - (5 - 1) } ]`

`= 2 - [3 - {6 - 4} ]`

`= [3 - 2]`

`= (2 - 1)`

`= 1`.

Question:`[3 1/4 ÷ {1 1/4 - 1/2 (2 1/2 - bar1/4 - 1/6)}]` 

`[13/4 ÷ { 5/4 - 1/2 (5/2 - (3-2)/12)}]`

`= [13/4 ÷ { 5/4 - 1/2 (5/2 - 1/12)}]`

`= [ 13/4 ÷ { 5/4 - 1/2 ((30 - 1)/12)}]`

`= [ 13/4 ÷ { 5/4 - 29/24}]`

`= [ 13/4 ÷ { (30 - 29)/24}]`

`= [ 13/4 ÷ 1/24]`

`= [ 13 xx 24]`

`= 78`.

Question:If `617 ÷ 24.68 + x = 90`,find the value of `x`. 

Let, `617 ÷ 24.68 + x = 90`.

Then,

`617/24.68 + x = 90`

or `25 + x = 90`

or `x = (90 - 25)`

`= 65`

Question:`1 +1/`
`1 + 1/`
`1 + 1/5` 

Given Expression ,
    `1 + 1/`

    `1 + 1/((6/5))`

    `= 1 + 1/`

    `= 1 +5/6`

    `= 1 + 1/(11/6)`

    `= (1 + 6)/(11)`

    `= 16/11`.

Question:`1 - 5/`
`7 + 1`
`4 + 1`
`2 + 1/3` 

Given Expression ,

 `= 1 - 5/`

 `7 + 1/`

 `4 + 1/(7/3)`

 `= 1 - 5/`
    
 `7 + 1/4 + ( 3/7)`

 `= 1 - 5/`
    
 ` 7 + 1/(31/7)`

 `= 1 - 5/`
    
 
 `7 + 7/(31)`

 `= 1 - 5/(224/31)`

 `= (1 - (5 xx 31)/(224))`

 `= ((224 -155)/(224))`

 `= (69)/(224)`

Question:A boy was asked to multiplied a certain number by `53`.He multiplied it by `35` and got his answar less than the correct one by `1206`.Find the number to be multiplied 

Let the required number be x.Then,

`53x -35x`

`= 1206` or `18x`

`= 1206` or `x = 67`

:. Required number `= 67`.

Question:In a callege, `1/5`th of the girls and `1/8` th of the boys took part in a social comp. What of the total number of students in the college took part in the camp. 

Out of `5` girls `1` took in the camp.

Out of `8` boys `1` took part in the camp.

:. Out of `13` students ,`2` took part in the camp .

:.`2/13` of the total strength took part in the camp .