Number Puzzle #154

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If 817 = 7

909 = 9

453 = 3

Then what is 1246 = ?

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its the sum of all digits in the number till you get single digit

so 1+2+4+6 => 13 => 4

so 1+2+4+6 => 13 => 4

This puzzle is courtesy pranav, shared on whatsapp

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Joseph Sanal says

these kind of puzzles are making a mockery of number theory

Students will be better served by learning number theory starting from 1st principles and then exploring applications

Joseph Sanal says

i agree

these kind of puzzles are making a mockery of number theory

Students will be better served by learning number theory starting from 1st principles and then exploring applications

Pramod Prabhudesai says

The Answer is 4

kaushik radadiya says

1+2+4+6=4

Rajaram Chandra Sah (Raju) says

The Answer is 4.

817 8+1+7=16 1+6=7

909 9+0+9=18 1+8=9

453 4+5+3=12 1+2=3

so, 1246 1+2+4+6=13 1+3=4

Harvey Lerman says

But the answer is 6, if the problem is “What is the last digit in this number?”