Find the next number in the below sequence 1, 2, 6, 21, 88, __?

1000 tribal people lives on an island. Out of them 100 have blue eyes and 900 has black colored eyes. Their religion forbids them to know their own eye color, or even to discuss the topic (there is no reflective surface where they can see their eyes). But all of them knows the eye color […]

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 …. of 99/100 of 1000?

A man can do a piece of work in 60 hours. If he takes his son with him and both of them work together, then the work is finished in 40 hours. How long will the son take to do the same job, if he worked alone on the job?

Two friends decided to get together and start riding bikes towards each other, both at a speed of 6 km/hr (starting at the same time). The live 36 km apart and hence will meet halfway. One of them have a pet pigeon and it starts flying the instant the friends start traveling. The pigeon flies […]

You have two identical ropes, which are non-uniform in composition. Each rope takes 60 minutes to burn (But non-uniformly, for example: 90% of the rope may burn in 5 min and rest 10% may take 55 min or any such composition). You don’t have any watch but a lighter. How will you calculate 45 minutes?

There are N doors in a row, numbered from 1 to N. Initially all are closed. Then you make N passes by N doors. In first pass you toggle (open the door if it is closed and close it if it is opened) all the doors starting from the first door. In the second pass […]

A Camel has to transport 3000 bananas from point A to point B, both 1000km apart. There are few constraints There is only one Camel. Camel can not carry more than 1000 bananas at one time. Camel eats one banana every kilometer when he travels. What is the maximum number of bananas which can be […]

What will come next in the below number series: A) 4, 6, 12, 18, 30, 42, 60, 72, ? B) 22, 21, 23, 22, 24, 23, ?, ? C) 5, 6, 7, 8, 10, 11, 14, ?, ?

There is a bridge that will collapse in 17 minutes. 4 people (A, B, C and D) are standing on one side of the bridge and want to cross it before it collapses. There are few restrictions, as below: It’s dark, so you can’t cross the bridge without a torch(flashlight), and there is only one […]