By using the symbols in the table given below, we can draw the following family tree:

Clearly, Q is grandmother (mother's mother) of T.

Hence, ‘Mother’s mother’ is the correct answer.

A, B, C, D, E and F are six friends sitting around a circular table, facing the centre of the table.

1. F is sitting to the immediate left of C.

2. B is the immediate neighbour of C and E.

3. A is the immediate neighbour of F and D.

Clearly, D is sitting between A and E.

Hence, 'D' is the correct answer.

Let's check each option,

1) ÷ and ×

→ 132 × 6 - 24 ÷ 5 + 9 = 43

→ 132 × 6 - 4.8 + 9 = 43

→ 792 - 4.8 + 9 = 43

→ 801 - 4.8 = 43

→ 762.8 ≠ 43

→ LHS ≠ RHS

2) + and ÷

→ 132 + 6 - 24 × 5 ÷ 9 = 43

→ 132 + 6 - 24 × 5/9 = 43

→ 132 + 6 - 13.3 = 43

→ 138 - 13.3 = 43

→ 124.7 ≠ 43

→ LHS ≠ RHS

3) - and +

→ 132 ÷ 6 + 24 × 5 - 9 = 43

→ 22 + 24 × 5 - 9 = 43

→ 22 + 120 - 9 = 43

→ 142 - 9 = 43

→ 133 ≠ 43

→ LHS ≠ RHS

4) + and × 

→ 132 ÷ 6 - 24 + 5 × 9 = 43

→ 22 - 24 + 5 × 9 = 43

→ 22 - 24 + 45 = 43

→ 67 - 24 = 43

→ 43 = 43

→ LHS = RHS

Here, we can see that only Option 4 satisfies the equation.

Hence, the correct answer is "+ and ×".

The image embedded in given figure is as shown below:

Hence, "Option 1" is the correct answer.

The image embedded in given figure is as shown below:

Hence, 'option 3' is the correct answer.

Mistake Points

Please note that except Option 4, in all the other options, one line is absent. The embedded figure is made by joining 4 lines.

The least possible Venn diagram is:

Conclusions:

I. Some doctors are umbrellas. → Follows (As, Some doctors are tigers and All tigers are umbrellas)

II. Some tigers are umbrellas. → Follows (As, All tigers are umbrellas)

III. Some buses are umbrellas. → Follows (As, Some umbrellas are buses)

Hence, 'All conclusions follow' is the correct answer.

Six people M, N, O, P, Q and R are sitting around a circular table, facing the centre.

1. N is sitting third to the left of Q.

2. R is sitting second to the left of N.

3. Q is the immediate neighbour of M and R.

4. O is the immediate neighbour of R and N.

P, the only person left will occupy the vacant position.

Clearly, P is sitting between M and N when considered from the right of N.

Hence, 'P' is the correct answer.

The logic followed here is:

Logic: Second number = First number × (First number ÷ 3 )

• 9 : 27 → 9 × (9 ÷ 3) = 9 × 3 = 27
• 12 : 48 → 12 × (12 ÷ 3) = 12 × 4 = 48

Similarly,

• 6 : ? → 6 × (6 ÷ 3) = 6 × 2 = 12

Hence, '12' is the correct answer.

Given statement: Girls native to Seoul will definitely get married at the age of 23. Beni is a 24 years old girl.

Conclusions:

i) Except Seoul girls, girls in other cities marry before 23.→ False (Because statement not talking about the other cities girl)

ii) Except Seoul girls, girls in other cities marry after 23.→ False (because statement not talking about the other cities girl)

So Neither i nor ii follows.

Hence, "Option 2" is the correct answer.

Six students are sitting around a circular table facing the centre.

1. E sits third to the right of D.

2. B is an immediate neighbour of both E and F.

3. D is an immediate neighbour of C.

4. A sits to the immediate left of C - Case I is not valid from this statement.

Clearly, A is the immediate neighbour of C and E.

Hence, 'A' is the correct answer.