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:

The average of five natural numbers is p. If the next three numbers are included then how much the average of these 8 numbers exceeds than the average p?

Find the sum of 30²+31²+32²+________+80²

The value of $${3.157×4126×3.198\over63.972×2835.121}$$ is closest to : 

Sum of two numbers is 15 and sum of their reciprocals is $$ {15\over56}$$. The two numbers are

The least number that must be subtracted from 1294 so that the remaining number when divided by 9, 11, 13 will leave in each case the same remainder 6 is:

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

663.48 + 22.51 - 292.63 = ? + 300.44 

The average of five consecutive number is 26, then the multiple of the first and the last number is