A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

Can it be possible to build a house that has all its four walls facing towards the South?

What type of tree can I carry in my hand?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

Complete the table series riddle by finding the number that can replace "??".

Can anyone tell me a word in the English dictionary which has a silent 'z'?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Decode below rebus
D
N
A
T
S , D