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?

Can you find out the remainder when 3^300 is divided by 5?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Find the smallest sentence with all the English alphabet.

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

A Club organizes a Running Race, and John, Jacob, Minda, and Tony participated.

The results are as follows

John beats Jacob
Minda beats Toni
Toni beats John

Who came first in the race?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

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

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!