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

$$({144\over16}×{828\over 9})=?+325 $$

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

$${210\over14}×{17\over15}×?=4096  $$

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

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:

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

663.48 + 22.51 - 292.63 = ? + 300.44 

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

23 × 45 ÷ 15=?

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

The number will be, whose square is equal to the difference between the squares of 975 and 585, is: