Hard Aptitude Number

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?




Similar Riddles

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

Asked by Neha on 05 May 2024


I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

Asked by Neha on 30 Jan 2024

Which is faster, Heat or Cold ? Explain.

Heat or Cold ?

Asked by Neha on 23 Mar 2021


Can you find out which options fits best with the missing column?

Fit the Blocks

Asked by Neha on 28 Dec 2020

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

Asked by Neha on 30 Sep 2025

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

Asked by Neha on 06 Sep 2021


Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Asked by Neha on 05 Feb 2024

Why is the longest human nose just 11 inches?

Asked by Neha on 17 Aug 2021

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Asked by Neha on 09 Dec 2023


What is the last thing you take off before bed?

Asked by Neha on 29 Aug 2025

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Amazing Facts

No Solution

In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki