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

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

What has to be broken before you can use it?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Why do people go to bed?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _