Advertisements
Advertisements
Question
The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 19.
Advertisements
Solution
Given, the sum of multiplication table of n natural numbers = 55 × n
Sum of table of 19 = 55 × 19 ...[Put n = 19]
= 1045
APPEARS IN
RELATED QUESTIONS
Observe the patterns of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches or calculators.

If the number of digits formed is taken to be n, the number of segments required to
form n digits is given by the algebraic expression appearing on the right of each pattern.
How many segments are required to form 5, 10, 100 digits of the kind −

If 9 is added to a certain number, the result is 36. Find the number.
If 11 is subtracted from 4 times a number, the result is 89. Find the number.
The sum of two consecutive even numbers is 74. Find the numbers.
The sum of three consecutive odd numbers is 21. Find the numbers.
Reena is 6 years older than her brother Ajay. If the sum of their ages is 28 years, what are their present ages?
A man is thrice as old as his son. Five years ago the man was four times as old as his son. Find their present ages.
The two digit number whose ten’s digit is ‘t’ and units’s digit is ‘u’ is ______.
If m is a whole number, then 2 m denotes a multiple of 2.
The side of an equilateral triangle is shown by l. Express the perimeter of the equilateral triangle using l.
The expression for the number of diagonals that we can make from one vertex of a n sided polygon is ______.
The length of a side of square is given as 2x + 3. Which expression represents the perimeter of the square?
The sum of first n natural numbers is given by `1/2n^2 + 1/2n`. Find the sum of first 5 natural numbers.
The sum of squares of first n natural numbers is given by `1/6n(n + 1)(2n + 1)` or `1/6(2n^3 + 3n^2 + n)`. Find the sum of squares of the first 10 natural numbers.
The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 7.
The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 10.
If
= 2x + 3,
= `3/2x + 7` and
= x – 3 then find the value of:
2
+
– ![]()
