Search Previous Year Questions

Given:

The average of 5 numbers is 50.

If one new number is added, the average becomes 60. 

Concept used:

Total = Average × Number of entities

Calculation:

Initially the total of 5 numbers = 5 × 50

⇒ 250

New total = (5 + 1) × 60

⇒ 360

Now, the new number = 360 - 250

⇒ 110

∴ The new number is 110.

Shortcut Trick

Check the product of the given options to match the Area (168 cm²).

(1) 12 × 14 = 168 (Matches)

(2) 24 × 17 = 408 (Incorrect)

(3) 32 × 4 = 128 (Incorrect)

(4) 42 × 12 = 504 (Incorrect)

∴ The correct answer is 12, 14 cm.

Alternate Method

Given:

Area of the rectangle = 168 cm²

Formula Used:

Area of Rectangle = Length (L) × Breadth (B)

Calculations:

⇒ L × B = 168

⇒ Testing Option (1): 12 × 14 = 168 cm²

⇒ Since the product of 12 and 14 equals the given Area, these are the dimensions.

∴ The correct answer is 12, 14 cm.

Additional Information

Perimeter of Rectangle

The total boundary length is given by 2 × (Length + Breadth).

Diagonal of Rectangle

The distance between opposite corners is calculated as √(Length² + Breadth²).

Square Property

A square is a special rectangle where Length = Breadth, and Area = Side².

The logic followed here is:

for a directory,

Option 1) telephone - It is a telecommunications device and not required in the directory.

Option 2) listing - the listing is compulsory for a directory because it gives the sequence.

Option 3) computer - It is an electronic device and not required in the directory.

Option 4) names - only names doesn't require for a directory, because it saves names along with his/her number.

Hence, the correct answer is "Option 2".

The logic followed here is:

So, 4^th figure is different from the other.

Hence, the correct answer is "Option 4".

The logic followed here is:

Circle, Oval, and Ball are are round(circle) shaped,

Whereas,

Triangle is a three dimensional shape.

Hence, the correct answer is "Triangle".

The logic followed here is:

Hence, the correct answer is "Option 3".

Given:

Seven students (including boys and girls) - A, B, C, D, E, F, and G are sit on three benches I, II and III.

At least two students sit on a bench, at least one girl on a bench - This means At least 1 boy and 1 girl sit on the bench among the two students.

1) A who is boy sits on bench I with his good friends.

Bench I - A(Boy)

2) F a boy sits only with B.

Bench II - F(Boy) and B(Girl).

3) G sits on bench III.

4) C who is a girl does not sit with A, E and D - It means C will sit with G (Because F sits only with B, so it cancels the possibility of B and F).

Bench III - G and C(Girl).

5. Remaining students will sit on Bench I:

6) E is the brother of C.

Bench I - A(Boy), E(Boy) and D(Girl).

So, final arrangements are:

Bench I - A(Boy), E(Boy) and D(Girl).

Bench II - F(Boy) and B(Girl).

Bench III - G(Boy) and C(Girl).

Here, C sits with G.

Hence, the correct answer is "G".

Given:

Seven students (including boys and girls) - A, B, C, D, E, F, and G are sit on three benches I, II and III.

At least two students sit on a bench, at least one girl on a bench - This means At least 1 boy and 1 girl sit on the bench among the two students.

1) A who is boy sits on bench I with his good friends.

Bench I - A(Boy)

2) F a boy sits only with B.

Bench II - F(Boy) and B(Girl).

3) G sits on bench III.

4) C who is a girl does not sit with A, E and D - It means C will sit with G (Because F sits only with B, so it cancels the possibility of B and F).

Bench III - G and C(Girl).

5. Remaining students will sit on Bench I:

6) E is the brother of C.

Bench I - A(Boy), E(Boy) and D(Girl).

So, final arrangements are:

Bench I - A(Boy), E(Boy) and D(Girl).

Bench II - F(Boy) and B(Girl).

Bench III - G(Boy) and C(Girl).

Here, 

the possible arrangement for Girls: CBD.

According to the given option: BCD is the arrangement is group of girls.

Hence, the correct answer is "Option 3".

Given:

Seven students (including boys and girls) - A, B, C, D, E, F, and G are sit on three benches I, II and III.

At least two students sit on a bench, at least one girl on a bench - This means At least 1 boy and 1 girl sit on the bench among the two students.

1) A who is boy sits on bench I with his good friends.

Bench I - A(Boy)

2) F a boy sits only with B.

Bench II - F(Boy) and B(Girl).

3) G sits on bench III.

4) C who is a girl does not sit with A, E and D - It means C will sit with G (Because F sits only with B, so it cancels the possibility of B and F).

Bench III - G and C(Girl).

5. Remaining students will sit on Bench I:

6) E is the brother of C.

Bench I - A(Boy), E(Boy) and D(Girl).

So, final arrangements are:

Bench I - A(Boy), E(Boy) and D(Girl).

Bench II - F(Boy) and B(Girl).

Bench III - G(Boy) and C(Girl).

Here, there are 3 Girls among the given students.

Hence, the correct answer is "Option 1".

The correct answer is Hot.

Key Points

• Sahara Desert
• The Sahara Desert is located in Africa.
• It is the largest hot desert in the world.
• All northern Africa is filled with this dessert.
• The total area of the Desert is somewhere about 3,320,000 square miles.
• The Desert expands and contracts, so the area of the Desert varies.
• In the west, the Desert is bordered by the Atlantic Ocean.
• The Atlas Mountains and the Mediterranean Sea border the Desert in the north.
• The Red Sea bounds the Mountain in the East.
• Atop the African shield, the Sahara sits.
• Denuded pre-Cambrian rocks make the African shield.
• Mesozoic deposits cover the Sahara Desert.