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

Count the number of triangles in the below picture?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Solve the puzzle by telling what does below picture means.

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

What 5-letter word typed in all capital letters can be read the same upside down?

How do you go from 98 to 720 using just one letter?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?