I’m tall when I’m young, and I’m short when I’m old. What am I?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

You have two jars of chocolates labelled as P and Q. If you move one chocolate from P to Q, the number of chocolates on B will become twice the number of chocolates in A. If you move one chocolate from Q to P, the number of chocolates in both the jars will become equal.

Can you find out how many chocolates are there in P and Q respectively?

You need to arrange three 7 and mathematical symbols to form number 1?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Given that

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

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

I have branches, but no fruit, trunk or leaves. What am I?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

What is common among 11, 69, and 88?