Advertisements
Advertisements
Question
The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 7.
Advertisements
Solution
Given, the sum of multiplication table of n natural numbers = 55 × n
Sum of table of 7 = 55 × 7 ...[Put n = 7]
= 385
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 −
Write down the following in the product form: x2y4
Write down the following in the product form: 6y5
Write down the following in the product form: 10a3b3c3
If 9 is added to a certain number, the result is 36. Find the number.
The sum of three consecutive natural numbers is 114. Find the numbers.
When Raju multiplies a certain number by 17 and adds 4 to the product, he gets 225. Find that number.
If a number is tripled and the result is increased by 5, we get 50. Find the number.
One out of two numbers is thrice the other. If their sum is 124, find the numbers.
Deepak is twice as old as his brother Vikas. If the difference between their ages is 11 years, find 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.
If I spend f rupees from 100 rupees, the money left with me is ______ rupees.
If m is a whole number, then 2 m denotes a multiple of 2.
The additive inverse of an integer x is 2x.
The side length of the top of square table is x. The expression for perimeter is ______.
The sum of first n natural numbers is given by `1/2n^2 + 1/2n`. Find the sum of natural numbers from 11 to 30.
The sum of the multiplication table of natural number ‘n’ is given by 55 × n. Find the sum of table of 19.
If 
= `3/4x - 2` and 
= x + 6, then find the value of:
2
– `3/2`
