# Number Formed by Any Power

The sum of the digits of a number formed by any power or index of 9 is always 9.

(i) 92 = 9 x 9 = 81 → 8 + 1 = 9

(ii) 93 = 9 x 9 x 9 = 729 → 7 + 2 + 9 = 18 → 1 + 8 = 9

(iii) 94 = 9 x 9 x 9 x 9 = 6561 → 6 + 5 + 6 + 1 = 18 → 1 + 8 = 9

(iv) 95 = 9 x 9 x 9 x 9 x 9 = 59049 → 5 + 9 + 0 + 4 + 9 = 27 → 2 + 7 = 9

(v) 9 x 7 = 63 → 6 + 3 = 9

(vi) 9 x 15 = 135 → 1 + 3 + 5 = 9

(vii) 9 x 17 = 153 → 1 + 5 + 3 = 9

(viii) 9 x 19 = 171 → 1 + 7 + 1 = 9

Related Concept

Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

## Recent Articles

1. ### Circle | Interior and Exterior of a Circle | Radius|Problems on Circle

Jun 20, 24 02:15 PM

A circle is the set of all those point in a plane whose distance from a fixed point remains constant. The fixed point is called the centre of the circle and the constant distance is known

2. ### Circle Math | Parts of a Circle | Terms Related to the Circle | Symbol

Jun 20, 24 01:55 AM

In circle math the terms related to the circle are discussed here. A circle is such a closed curve whose every point is equidistant from a fixed point called its centre. The symbol of circle is O. We…

Jun 19, 24 09:49 AM

In math practice test on quadrilateral worksheet we will practice different types of questions in quadrilateral. Students can practice the questions of quadrilateral worksheet before the examinations

4. ### Worksheet on Triangle | Homework on Triangle | Different types|Answers

Jun 19, 24 08:59 AM

In the worksheet on triangle we will solve 12 different types of questions. 1. Take three non - collinear points L, M, N. Join LM, MN and NL. What figure do you get? Name: (a)The side opposite to ∠L…

5. ### What is a Quadrilateral? | Symbol of a Quadrilateral □ | Rectangle

Jun 19, 24 08:37 AM

What is a quadrilateral? A simple closed curve or a polygon formed by four line-segments is called a quadrilateral.