A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Can you count the number of squares in the given picture?

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?

Count the number of triangles in the picture below:

Find the missing letter in the last circle logically in the given below picture.

Which country gets ill every time?

What am I?