What is friendliest number?

WHAT IS A FRIENDLY NUMBER? In this case, we refer to friendly numbers as a number that is easy to work with. For example, multiples of 10 are “friendly” because they are easy to work with when we add or subtract. When we use the “friendly number” strategy for addition, it helps us work with big numbers.

What is the lowest friendly number?

The numbers 1 through 5 are all solitary. The smallest "friendly number" is 6, forming for example, the "friendly" pair 6 and 28 with "abundancy" σ(6) / 6 = (1+2+3+6) / 6 = 2, the same as σ(28) / 28 = (1+2+4+7+14+28) / 28 = 2. The shared value 2 is an integer in this case but not in many other cases.

What are nice numbers?

A number is said to be a nice number if it has exactly 4 factors (includng 1 and the number itself).

What are the friends numbers?

According to the theory, the tightest circle has just five people – loved ones. That's followed by successive layers of 15 (good friends), 50 (friends), 150 (meaningful contacts), 500 (acquaintances) and 1500 (people you can recognise).

What are 3 good numbers?

1, 3, 7, 9, 13, 15, 21, 25, 31, 33, 37, 43, 49, 51, 63, 67, 69, 73, 75, 79, 87, 93, 99, 105, 111, 115, 127, 129, 133, 135, 141, 151, 159, 163, 169, 171, 189, 193, 195, 201, 205, 211, 219, 223, 231, 235, 237, 241, 259, 261, 267, 273, 283, 285, 289, 297, 303, 307, 319, 321, 327, ...

Finding Friendly Numbers

What are 5 happy numbers?

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, ...

Is 9 friends a lot?

In general, based on 2021 survey data, the average person in America has between 3 and 5 close friends. According to this survey: almost half (49%) report having 3 or fewer close friends. over one-third (36%) report having between 4 and 9 close friends.

Is 10 friends a lot?

14% have 1-2 close friends. 39% have 3-5 close friends. 18% have 6-9 close friends. 27% have 10 or more friends.

Which number is best in friendship?

The scientist's social brain hypothesis argues that there is a precise ceiling to the number of stable relationships people can comfortably maintain. Known as “Dunbar's Number,” 150 is the tippy top limit—five being close loved ones, 15 being good friends, 50 being friends and so on.

What is the rarest number?

6174 is known as Kaprekar's constant after the Indian mathematician D. R. Kaprekar. This number is renowned for the following rule: Take any four-digit number, using at least two different digits (leading zeros are allowed).

What is a cute number?

A number is called cute if it has exactly four positive integral divisors.

Why is 7 a cool number?

The number 7 is often considered lucky, and it has a definite mystique, perhaps because it is a prime number—that is, it cannot be obtained by multiplying two smaller numbers together.

What are the least liked numbers?

More than any other number, people seemed to pick 0 because they thought it was a clever thing to do, Bellos says. As for the world's “least favorite” number, that would be 110. It was the smallest whole number that didn't get any votes at all.

What is a friendly ten?

102. WHAT IS A FRIENDLY NUMBER? In this case, we refer to friendly numbers as a number that is easy to work with. For example, multiples of 10 are “friendly” because they are easy to work with when we add or subtract.

What are friendly numbers to 3?

The friendly and compatible numbers for Number 3 are 1, 2, 3, 5, 6, 8, 9.

How many friends should a 12 year old have?

Rooney advises keeping things in perspective. “Kids need just one or two good friends. You don't have to worry about them being the most popular kid in their class.”

How many friends does a girl need?

Research suggests that the number of close friends we need to feel that we have enough is somewhere between three and five. Not only that, but adults with four or five friends enjoy the highest levels of life satisfaction and those with three close friends are not far behind.

How many friends should a 4 year old have?

It's a good idea to start with playdates with one or two friends rather than a lot of children, especially if your child is shy or slow to warm up in social situations.

Is it normal to have 100 friends?

Dunbar says 150 for simplicity, but really, it's a range between 100 and 250, depending on several factors. Dunbar: One is obviously personality. So introverts prefer to have fewer friends.

How many friends does a 16 year old have?

Fully 98% of teens say they have one or more close friends: 78% say they have between one and five close friends, while 20% have six or more close friends. Just 2% of teens say they do not have anyone they consider a close friend.

How many friends after 30?

In your 30s and 40s, a small, tight-knit group is optimal. Having three to five close friends allows for paired activities (tandem biking, charades), as well as intimate group outings (movie nights, wine tastings, group discount rates).

What is a sneaky number?

A number is "sneaky" if you finally reach ZERO. Example 1: Is 95 sneaky?

Is 5555 a happy number?

You can find a lot of 'happy numbers' such as: 310, 70, 86, 130, 7, 5555, 1212, 13, 1000 and other numbers which are variations of these, e.g. swapping the numbers the other way around (13, 31) and adding zeros onto the end of numbers (31, 310).

Is 888 a happy number?

1, 7, 13, 19, 23, 28, 44, 49, 68, 79, 129, 133, 139, 167, 188, 226, 236, 239, 338, 356, 367, 368, 379, 446, 469, 478, 556, 566, 888, 899. (sequence A124095 in the OEIS).