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 ?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

An inspection by the superintendent of St. Joseph School was scheduled on the next day. The class teacher Jenifer knew that he would be asking questions from her class and she would have to choose a pupil to answer. To offer a perfect impression over him, the teacher explained certain instructions to the students to maximise the chances of getting correct answer every time.

What did she say to the students?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

Replace the question mark with the correct number.

2, 3, 5, 9, 17, _ What is the next number in the sequence?

There is something which you can be arrested for attempting but not for successfully completing.

You need to move three matchsticks to form three squares. Can you do it?

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

which number am I?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?