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The logic followed here is:

Let the number of girls be G and the number of boys be B.

According to the given information:

B = 2G

B + G = 66

Substituting B = 2G into the second equation:

2G + G = 66

3G = 66

G = 66 / 3

G = 22

Therefore, the number of girls is 22 and the number of boys is 44.

Pavithra is ranked 18^th from the top, and there are 11 boys ahead of her.

So, the number of girls ahead of Pavithra = 18 - 11 - 1 = 6 (since Pavithra is also a girl).

Total number of girls = 22

Number of girls after Pavithra = 22 - 7 = 15

Hence, the correct answer is "Option 2".

Given equation: 4 + 18 – 3 × 2 ÷ 6 = 10

1. Interchanging ÷ and –

= 4 + 18 ÷ 3 × 2 - 6 

= 4 + 6 × 2 - 6 

= 4 + 12 - 6

= 16 - 6

10 = 10

2.Interchanging × and +

= 4 × 18 – 3 + 2 ÷ 6 

= 4 × 18 – 3 + 0.3333

= 72 - 3 + 0.333

= 72.333 - 3 

69. 33 ≠ 10

3.Interchanging × and ÷

= 4 + 18 – 3 ÷ 2 × 6 

= 4 + 18 – 1.5 × 6 

= 4 + 18 – 9

= 22 - 9 

13 ≠ 10

4.Interchanging + and –

= 4 - 18 + 3 × 2 ÷ 6 

= 4 - 18 + 3 × 0.3333

= 4 - 18 + 1

= 4 - 17

• 13 ≠ 10

Hence, by interchanging "÷ and –" we get the correct answer.

Arranging them according to the given information:

1)Only 3 boxes are placed between T and P, and neither is placed at the top or bottom.

 

 

2. S is placed in the middle of the boxes. Two boxes are kept between S and L, which is immediately below T. So case 2 will be eliminated

 

3) F is kept above L and below P, but not immediately below. 

 

4) Two boxes are kept between S and H.

 

The final arrangement is as below:

 

So, T is placed third below O.

Hence, "T" is the correct answer.

Seven persons: F, G, H, I, J, K and L

i) F and I are sitting at extreme ends of the row.

ii) J is sitting third to the right of H.

 

iii) G is sitting to the right of J.

This eliminates case 2.

iv)  L is not an immediate neighbour of H.

This also determines the position of K.

Hence, three persons are sitting between H and G.

Solution:

The pattern followed here is:

Logic: (1^st number ÷ 2) + 4 = 2^nd number

So, the last number is:

(84 ÷ 2) + 4 = 46

Hence the correct answer is "46".

The logic followed here is:

Logic: The number in the coded language denotes the number of vowels present in the given word to be coded.

DESK is coded as 'BCQI1',

→ There is only 1 vowel in the word DESK.

CHAIR is coded as 'AFYGP2',

 → There is only 2 vowels in the word CHAIR.

Similarly,

'TABLE' can be coded as,

 → There is only 2 vowels in the word TABLE.

Hence, the correct answer is "RYZJC2".

According to the given information:

1. There are Maths and Biology classes on Monday and Friday.

 

2. Maths and English classes are scheduled on Tuesday and Friday. ​

 

3. Chemistry and Biology classes are scheduled on Wednesday and Monday.

 

4. Physics and English are scheduled on Tuesday, Wednesday and Thursday.

 

Thus, 'Friday' has classes for English, Biology and Maths.

Hence, the correct answer is "Friday".

Sequence goes as:

Egg → Larva → Pupa → Butterfly → Death.

The logic followed here is:

DESK is coded as 'CEDFRTJL'

CHAIR is coded as 'BDGIZBHJQS',

Similarly, TABLE will be coded:

Hence, the correct answer is "SUZBACKMDF".

Given:

• Number of floors = 7
• Number of people = 6, namely  A, B, C, D, E, and G.
• One of the floors in the building is vacant.
• The ground floor is numbered floor number 1 and so on till the topmost floor is numbered 7.

​Explanation:

• A stays two floors above G who lives on an odd prime numbered floor.

• B stays two floor below E, who does not stay at the topmost floor → There are two possibilities for the position of B and E.
• C is living above E and G but below A → As in case -(2) there is no possible position for C i.e above E and G and below A , therefore this case is eliminated.

• An even numbered floor is vacant.→ As in case - (1) there is no possible position for vacant floor, therefore this case is eliminated.
• Also after the condition of vacant position at even numbered floor, only one position is left which will be occupied by the only person left i.e D.​

Thus, according to the final arrangement either E or G is living immediate above the vacant floor. As out of all the options only G is given, therefore G lives immediate above vacant floor.

Hence, "G" is the correct answer.