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

Sum of two numbers is 15 and sum of their reciprocals is . The two numbers are

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: 

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

What value will come in place of question mark (?) in the questions given below?

663.48 + 22.51 - 292.63 = ? + 300.44 

The sum of three numbers is 252. If the first number is thrice the second and third number is two-third of the first, then the second number is

A number consists of two digits and the digit in the ten's place exceeds that in the unit's place by 5. If 5 times the sum of the digits be subtracted from the number, the digits of the number are reversed. Then the sum of the digits of the number is: