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.

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _