Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Can you replace the question mark with the correct number in the below table sequence?

Can you name some countries which do not have the alphabet 'A' in them?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?