My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

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?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

With the help clues provided in the image, can you find the 5 digit key?

Find the next number in the series.
1 10 24 43 67 ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?