When can we add 2 to 11 and get 1 as the correct answer?

Can you find out the missing number in the grid?

What is full of holes but still holds water?

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

Count the number of triangles in the below picture?

Find the next number in the series below

21 32 54 87 131 ?

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

What number when divided in half becomes zero?

There are 4 big houses. They are made from the materials: red marble, green marble, white marble and blue marble.

* Mrs Jennifer's house is somewhere to the left of the green marble one and the third one alone is white marble.
* Mrs Sharon owns a red marbles house and Mr Cruz does not live at either end, but lives somewhere to the right of the blue marbles house.
* Mr Danny lives in the fourth house, while the first house is not made from red marble.

Who lives where, and what is their house made from?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?