- Is 5 a happy number?
- Why is 7 the perfect number?
- What is a sad number?
- Is 13 a Fibonacci number?
- Is 35 a perfect square?
- What are the first 5 perfect numbers?
- What is perfect number example?
- Is 64 a perfect number?
- Why is three the perfect number?
- What is the happiest number?
- Is 42 a perfect number?
- Is 12 a perfect number?

## Is 5 a happy number?

The first few happy numbers are 1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91, 94, 97, 100, …

…

The numbers of iterations required for these to reach 1 are 0, 5, 1, 2, 4, 3, 3, 2, 3, 4, 4, 2, 5, …

(OEIS A090425)..

## Why is 7 the perfect number?

Seven is the number of completeness and perfection (both physical and spiritual). It derives much of its meaning from being tied directly to God’s creation of all things. … The word ‘created’ is used 7 times describing God’s creative work (Genesis 1:1, 21, 27 three times; 2:3; 2:4).

## What is a sad number?

An unhappy number is a number that is not happy, i.e., a number such that iterating this sum-of-squared-digits map starting with. never reaches the number 1. The first few unhappy numbers are 2, 3, 4, 5, 6, 8, 9, 11, 12, 14, 15, 16, 17, 18, 20, … (OEIS A031177).

## Is 13 a Fibonacci number?

The Fibonacci Sequence is the series of numbers: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, …

## Is 35 a perfect square?

Is 35 a perfect square number? A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 35 is about 5.916. Thus, the square root of 35 is not an integer, and therefore 35 is not a square number.

## What are the first 5 perfect numbers?

The first few perfect numbers are 6, 28, 496 and 8128 (sequence A000396 in the OEIS).

## What is perfect number example?

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128. The discovery of such numbers is lost in prehistory.

## Is 64 a perfect number?

In mathematics It is the smallest number with exactly seven divisors. It is the lowest positive power of two that is adjacent to neither a Mersenne prime nor a Fermat prime. … 64 is also the first whole number that is both a perfect square and a perfect cube.

## Why is three the perfect number?

Three is the smallest number we need to create a pattern, the perfect combination of brevity and rhythm. … It’s a principle captured neatly in the Latin phrase omne trium perfectum: everything that comes in threes is perfect, or, every set of three is complete.

## What is the happiest number?

What is the happiest number between 1 and 1,000,000. Defined the happiest number as the smallest number that finds the most other happy numbers with it, i.e. 7 found four other numbers (49, 97, 130, and 10) making it a rank 4 in happiness.

## Is 42 a perfect number?

Answer and Explanation: No, 42 is not a perfect number. In general, we determine if a number, x, is a perfect number using the following steps: Find the divisors of x.

## Is 12 a perfect number?

Twelve is a sublime number, a number that has a perfect number of divisors, and the sum of its divisors is also a perfect number. Since there is a subset of 12’s proper divisors that add up to 12 (all of them but with 4 excluded), 12 is a semiperfect number. … A twelve-sided polygon is a dodecagon.