If 1+9+8=1, what is 2+8+9?

Can you solve below mathematical equation?

2^1234 - 2^1233

What number should come in place of the question mark below?

If an electric train is travelling south, then which way is the smoke going?

Why is 6 afraid of 7?

I add 5 to 9 and get 2. The answer is correct, so what am I?

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

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

What will you call your mother's brother's brother-in-law?