Direction : What value should come in the place of question mark (?) in the following questions?

The number which can be written in the form of n (n+1) (n+2), where n is a natural number, is: 

4⁶¹ + 4⁶² + 4⁶³ + 4⁶⁴ is divisible by: 

If the fractions , , and are arranged in ascending order, which one will be the fourth?

The difference between the greatest and the least four-digit numbers that begins with 3 and ends with 5 is: 

How many natural numbers divisible by 7 are there between 3 and 200? 

If 40% of a number is equal to 3 / 5th of another number, what will be the ratio of the first number and the second number?

Direction : What value should come in the place of question mark (?) in the following questions?