Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

Solve the mathematical equation in the picture below.

Find the smallest sentence with all the English alphabet.

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Next Number in the Series,

5, 16, 49, 104, ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?