In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

What runs around the whole yard without moving?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?