Number on the Bottom

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?




Similar Riddles

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Asked by Neha on 27 Aug 2021


I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

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Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

Asked by Neha on 20 Feb 2025

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

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What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

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What shoe company does this rebus represent?

Shoes Company Rebus Riddle

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