Solution:

15

Explanation:
3drink = 30 ....... EquationA
1drink + 2 burger = 20 ....... EquationB
burger + 4 fries = 9 ....... EquationC
burger + fries * drink = ?

From EquationA
drink = 10

From EquationB
burger = (20-10)/2 = 5

From EquationC
fries = (9-5)/4 = 1

Hence
burger + fries * drink = 5 + 1 * 10 = 5 + 10 = 15

Solution:

step 3 is wrong

Solution:

The figure tells that B is located to the North-East of E.

Solution:

See the figure for the answer. Wasn't it a bit tricky?

Solution:

8/(1−1/5)

Solution:

What is the correct time ?

Solution:

TIF56

Explanation:
The password is formed as:
T (5th letter of Shruti)
I (5th letter of Arshika)
F(1st letter of Friday)
5(5th day of week)
6(Length of Friday)

Similarly, we will pick the 1st letter for Monday and 3rd letter for Wednesday.

Solution:

45 minutes

Explanation :
All you have to do is burn the first rope from both the ends and the second rope from one end only simultaneously. The first rope will burn in 30 minutes (half of an hour since we burned from both sides) while the other rope would have burnt half. At this moment, light the second rope from the other end as well. Where, the second rope would have taken half an hour more to burn completely, it will take just 15 minutes as we have lit it from the other end too.

Thus you have successfully calculated 30+15 = 45 minutes with the help of the two given ropes.

Solution:

Hhe hung herself using big Ice slabs , which are now now melted and hence puddle of water.

Solution:

100

Series of number that do not contain albhabet 'T'

Solution:

This statement is true but only in a specific case i.e. if both of the siblings continue to live till the day the younger is as old as the elder one was during the time of their birth.