Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

You see me once in June, twice in November, and not at all in May. What am I?

What occurs twice in a week, once in a year but never in a day?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

Which is the smallest number that you can write using all the vowels exactly once?

Out of four images which one is the odd one out?