Sham S.Misri
Curious Numbers
Puzzle 1
Which of the following numbers is not happy?
19, 23, 25, 28, 31
Solution(Correct answerJ
25 is the only number in the sequence that is not a so-called “happy number”.
A happy number is a positive number which, if you replace the number by the sum of the squares of each individual digit and then continue repeating the process, will eventually become 1.
For example 19:
12 + 92 = 82
82 + 22 = 68
62 + 82 = 100
12 + 02 + 02 = 1
Curious Numbers
Puzzle 2
Sham S. Misri
What is the missing number?
1259 x2 +1 =2519
839 x 3 + 2 = 2519
629 x 4 + 3 = 2519
503 x 5 + 4 = 2519
?
359 x 7 + 6 = 2519
314 x 8 + 7 = 2519
279 x 9 + 8 = 2519
251 x 10 + 9 = 2519
Solution:
In two steps.
i)
The next equation , likely to be
will be
X. 6 + 5 = 2519
Or 6.X = 2519
Or X = 42.
ii)
From eq. (i)
X. 6 + 5 = 2519
6X = 2519 - 5
6X = 2514
X = 2514 /6
= 419
Therefore, Missing
numbers may be 419 X 6 + 5 = 2519.
Curious Numbers
Puzzle 3
What is unique about the number 4?
Sham S. Misri
Solution
i)
It is the only number which is spelled with the same number of letters
as its numerical value.
F-O-U-R
ii)
To the nearest one, four is the average temperature of the oceans in
degrees Celsius.
iii)
Water has the maximum density at
40 Centigrade.
No comments:
Post a Comment