Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If you say my name, I will no longer exist. What am I?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Find out the missing number in the picture attached:

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?