Puzzles

Sham S.Misri

Curious Numbers

 Puzzle 1

Find out the answer to the Curious Numbers puzzle number 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.