Can you solve below mathematical equation?

2^1234 - 2^1233

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

What has no start, end, or centre?

What has one eye, but can’t see?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Count the number of lines in the image below ?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

John was piloting a plane behind a car but was never able to overtake it. Why?