Hard Aptitude Number

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




Similar Riddles

Can you arrange the six given marbles in a manner that each one of them is touching all four marbles of different colours?

Arrange the Marbles

Asked by Neha on 18 Aug 2026


I ask Joseph to pick any 5 cards out of a deck with no Jokers.

He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Jack can't see any of this). I look at the cards and I pick 1 card out and give it back to Joseph. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Jack.

Jack looks at the 4 cards i gave him, and says out loud which card Joseph is holding (suit and number). How?

The solution uses pure logic, not sleight of hand. All Jack needs to know is the order of the cards and what is on their face, nothing more.

Asked by Neha on 10 May 2021

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Asked by Neha on 06 Nov 2023


You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

Asked by Neha on 02 Apr 2026

What does this rebus riddle mean?

All Rebus Riddle

Asked by Neha on 27 Jun 2026

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

Asked by Neha on 23 Jul 2025


Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Asked by Neha on 24 Nov 2024

What is Luis Suarez's (Soccer Player) favorite tea?

Asked by Neha on 26 May 2026

Select from the four options below!

a) Geneva, Switzerland
b) New York City, USA
c) Paris, France
d) London, England

Asked by Neha on 09 Sep 2026


Do you know who was buried in John's tomb?

Asked by Neha on 27 Feb 2026

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Challenging

There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.