X is the Answer

Number Theory Level 1

How many 2-digit integers are there in which the sum of the digits equals 11?

Don't get confused with the title of the problem


The answer is 8.

Ritu Roy by Ritu Roy , 22, India

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8 solutions

Renuka Iyer
Jun 19, 2014

29 38 47 56 65 74 83 92 are the 8 two digit numbers whose sum is 11

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Himanshu Arora
Jun 6, 2014

There are just 8 such two digits numbers.

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Is 8 2digit no

Rupal Sumbad - 6 years, 11 months ago

they are 29,38,47,56,65,74,83,92

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Gaurav Singh
Jun 30, 2014

29 38 47 56 65 74 83 92 are the 8 two digit numbers whose sum is 11 . not other solution

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Anjna Anilkumar
Jun 17, 2014

8 two digits are there

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Tanya Gupta
Jun 14, 2014

"Don't get confused with the title of the problem":- that line confused me more that the title of the problem itself!!

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The title had a number in the place of x originally. Perhaps the admin might have changed the title into 'X is the answer'

Ritu Roy - 6 years, 9 months ago
Umang Vasani
Jun 7, 2014

29,38,47,56,65,74,83,92

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Ritu Roy
May 31, 2014

There are 8 two digit nos having 11 as the sum of their digits: 29, 38, 47, 56, 65, 74, 83, and 92.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

11 is formed by adding 6 + 5 or 7 + 4 or 8 + 3 or 9 + 2

thus the numbers will be 65, 56, 47, 74, 38, 83, 29, 92

thus there are 8 two digit nos having 11 as the sum of their digits: 29, 38, 47, 56, 65, 74, 83, and 92.

Arun AR - 6 years, 10 months ago

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