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

$$ 68\sqrt?-826=262 $$

A man has eaten 100 grapes in 5 days. He eats 6 more grapes every day in comparison to the previous day. How many grapes did he eat on the first day?

Thrice the square of a natural number decreased by four times the number is equal to 50 more than the number. The number is :

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

(4425÷25) ×(8.5×16) = ?

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

$$ \sqrt{8281} =(?) $$

The sum of the digits of a 2 digit number is 9. When 27 is added to the number, the digits get interchanged. Find the number.

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

$$ \sqrt{1089} + 3=(?)^2 $$

The value of $$ { 32^{0.16}×32^{0.04}}$$ is: