The logic followed here is:

Here,

@ means ×

# means +

Now,

For, 40 @ 2 # 3 = 83

⇒ 40 × 2 + 3 = 83.

For, 60 @ 2 # 5 = 125

⇒ 60 × 2 + 5 = 125.

For, 39 # 13 @ 5 = ?

⇒ 39 + 13 × 5 

= 39 + 65 = 104.

Hence, the correct answer is "104".

Mistake Points

The symbols given in the last term is opposite form the previous Two.

So, calculate it carefully.

The logic followed here is:

Logic: The Symbols has shifted one place in next images and one new symbol added from the each next boxes.

So, the complete series will be:

Hence, the correct answer is "Option 2".

Mistake Points

A new symbol/letter is adding in both side of X alternatively, And according to the pattern, the new symbol/letter should be added before X as the given in option 2. So, Option 3 (=) eliminated here.

Preparing the family tree using the following symbols:

According to the given question: 

"A + B ÷ C × D - E + F" is shown as a family tree diagram below,

Now, let's check each option:

1) A is the grandson of F → True

2) A is the son of C → True

3) E is the brother of B → False

4) D is the daughter of F → True

Hence, the correct answer is "E is the brother of B".

Given:

• The image must not to be rotated

Hence, the correct answer is "Option - (3)".

The positional value of the alphabet is:

The logic followed here is as follows:

Hence the correct answer is "GMJ58".

The pattern followed here is:

The logic followed here is:

Except option 1, sum of the place value of the letter of all the options is 54.

Option 1 → GVTB → 7 + 22 + 20 + 2 = 51

Option 2 → XGCT → 24 + 7 + 3 + 20 = 54

Option 3 → WDSH → 23 + 4 + 19 + 8 = 54

Option 4 → DWJQ → 4 + 23 + 10 + 17 = 54

Thus option 1 is odd one.

Hence, the correct answer is "Option 1".

According to the given information,

1) O sits between T and B who sits second left of L.

2) Y is not an immediate neighbour of T.\

Hence, T sits immediate left of O.

The pattern followed here is:

Logic: (First number)³ + (Third number)³ = (X ÷ 5) = Second number.

(6, 189, 9) → (6)³ + (9)³ = (216 + 729) = 945 ÷ 5 ⇒ 189

And,

(5, 225, 10) → (5)³ + (10)³ = (125 + 1000) = 1125 ÷ 5 = 225

Similarly,

(7, 171, 8) → (7)³ + (8)³ = (343 + 512) = 855 ÷ 5 = 171

Hence, the correct answer is "Option 3".

The pattern followed is

Hence, the correct answer is JMDFVR.

1. Six friends A, B, C, D, E and are sitting around a roundtable facing the centre.

2. C is seated between A and B, who is to the immediate left of D.

3. C is facing E,

The arrangement will be as shown below:

So, ‘B’ is facing F.

Hence, ‘B’ is the correct answer.