Can you find the odd number in the following?

2716, 4135, 5321 and 7145

I have eight fingers and two thumbs but I do not live. What Am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

what does this picture(rebus) riddle means ?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M