Eighteen
(18)
1. It
is a Lucas number. Like Fibonacci number, in Lucas number the next number of
this series is obtained by summing up the previous two numbers. The series goes
like- 1, 3, 4, 7, 11, 18…
2.It
is the sum of four consecutive numbers.
18 = 3 + 4 + 5 + 6
3. The
number 18 is considered a number of the devil due to the fact that 6 + 6 + 6 =
18 and 666 is the number of beast.
4. It
is the only number which is twice the sum of its digits.
18 = 2 x ( 1 + 8 )
5. It
is a Pentagonal Pyramid number because it is the sum of three Pentagonal numbers.
6. It
is the second abundant number. A number is called Abundant if the sum of its
divisor excluding itself is more than itself. The divisors of 18 are 1, 2, 3,
6, and 9. 1
+ 2 + 3 + 6 + 9 > 18
7. It
can be portioned in 385 ways.
8. The
cube and fourth powers of 18 use all the digits from 0 to 9. 183
= 5832 184
= 104976
9. It
is equal to sum of the digits of its cube, its 6th power
and 7th power.
183 = 5832
and 5 + 8 + 3 + 2 = 18
186
= 34012224 and 3 + 4 + 0 + 1 + 2 + 2 + 2
+ 4 = 18
187
= 612220032 and 6 + 1 + 2 + 2 + 2+ 0 + 0 + 3 + 2 = 18
10. It
is the amount of time taken by Moon to tilt its orbit in order to rotate a full
circle.
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Rajesh Kumar Thakur
rkthakur1974@gmail.com
Lots of learning happening each day.Thank you for the enlightening us with your wisdom.Looking forward for more such quizzes and information.Bhakti Akheniya
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