Search Previous Year Questions

Concept Used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

24 + 112 – 64 ÷ 8 + 12 ÷ 3 = ?

⇒ 24 + 112 – 8 + 4 = ?

⇒ 136 – 8 + 4 = ?

⇒ 140 – 8 = ?

⇒ ? = 132

∴ Result will be 132.

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

26 + 22 – 24 + 112 ÷ 16 × 4 = ? 

⇒ 26 + 22 – 24 + 7 × 4 = ?

⇒ 26 + 22 – 24 + 28 = ?

⇒ 76 – 24 = ?

⇒ 52 = ?

∴ Result will be 52.

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

1728 - √144 × 20 ÷ 2.5 + 89 – 12 = ?

⇒ 1728 – 12 × 8 + 89 – 12 = ?

⇒ 1728 – 96 + 89 – 12 = ?

⇒ 1817 – 108 = ?

⇒ 1709 = ?

∴ Result will be 1709.

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

[(22)2 × 2 ÷ 22] ÷ 44 × 5 – 1 = ? – 124

⇒ [484 ÷ 11] ÷ 44 × 5 – 1 = ? – 124

⇒ 44 ÷ 44 × 5 – 1 = ? – 124

⇒ 1 × 5 – 1 = ? – 124

⇒ 5 – 1 = ? – 124

⇒ 4 = ? – 124

⇒ ? = 128

∴ ? = 128

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

⇒ 2000 % of 15 ÷ 5 × 12 = ?

⇒ 300 ÷ 5 × 12 = ?

⇒ 60 × 12 = ?

⇒ ? = 720

∴ ? = 720

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

81 – 9 × √49 + 21 + √225 × 2 = ?

⇒ 81 – 9 × 7 + 21 + 15 × 2 = ?

⇒ 81 – 63 + 21 + 30 = ?

⇒ 81 – 63 + 51 = ?

⇒ 132 – 63 = ?

⇒ 69 = ?

∴ ? = 69.

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

81 ÷ 9 × 3 + 21 – 63 + 16 × 6 = ?

⇒ 9 × 3 + 21 – 63 + 16 × 6 = ?

⇒ 27 + 21 – 63 + 96 = ?

⇒ 144 – 63 = ?

⇒ 81 = ?

∴ The value of ? is 81

Given:

M.R.P = 30% more than CP

Discount = 30%

Loss = Rs. 810

Formula Used:

Cost price × (100 + Profit %)/100 = Selling price

Also, Cost price × (100 - Loss %)/100 = Selling price

{(M.R.P – S.P)/M.R.P} × 100 = Discount %

Calculation:

Let the C.P of the product be 100x.

M.R.P = 100x × (130/100)

⇒ 130x

Discount = 30%

⇒ 130x × (30/100) = 39x

S.P = 130x – 39x

⇒ 91x

Loss = C.P – S.P

⇒ 100x – 91x

⇒ 9x

Value of 90x = 810

⇒ x = 810/9

⇒ x = 90

C.P = 100x

⇒ 100 × 90

⇒ 9000

∴ The cost price of the product was Rs. 9000.

Alternate Method

Let C.P be 100x.

C.P : M.R.P : Dis. : S.P : Loss

100x : 130x : 39x : 91x : 9x

Loss = 810

⇒ 9x = 810

⇒ x = 90

C.P = 100x

⇒ 100 × 90

⇒ 9000

∴ The cost price of the product is Rs. 9000.

Given: 

The ratio of Salaries of A, B and C = 2 ∶ 5 ∶ 7

Increment in salary of A = 5%

Increment in salary of B = 20%

Increment in salary of C = 30%

Formula used:

Salary after increment = old salary × [(100 + increased percent)/100]

Calculation:

Let the salary of A, B and C is 2x, 5x and 7x respectively.

New salary of A after increment = 2x × (105/100) = 210x/100

New salary of B after increment = 5x × (120/100) = 600x/100

New salary of C after increment = 7x × (130/100) = 910x/100

Now, Ratio of the salaries of A, B and C = 210x ∶ 600x ∶ 910x

⇒ 21 ∶ 60 ∶ 91

∴ The new ratio of salaries of A, B and C is 21 ∶ 60 ∶ 91 respectively.

Given:

Ratio of milk and water in the mixture = 7 : 5

Amount of milk added = 15 litres

Amount of water added = 25 litres

Ratio of final mixture = 1 : 1

Formula used:

∴ (Ratio of milk in the mixture + new quantity of milk added) : (Ratio of water in the mixture + new quantity of water added) = New ratio of mixture

Calculation:

Let the amount of milk and water be 7x and 5x respectively

New amount of milk added = 15 litres

Final amount of milk = (7x + 15) litres

New amount of water added = 25 litres

Final amount of water added = (5x + 25) litres

Final ratio = 1 : 1

Now, as we know that

(Ratio of milk in the mixture + new quantity of milk added) : (Ratio of water in the mixture + new quantity of water added) = New ratio of mixture

\( \Rightarrow \frac{{7x + 15}}{{5x + 25}} = \frac{1}{1}\)

⇒ 7x + 15 = 5x + 25

⇒ 2x = 10

⇒ x = 5 litres

Now, quantity of milk in the new mixture = (7x + 15) litres

⇒ Quantity of milk in the new mixture = (7 × 5 + 15) litres

⇒ 50 litres