Advertisements
Advertisements
Question
The sum of three consecutive odd natural numbers is 69. Find the prime number out of these numbers.
Advertisements
Solution
Let us assume three consecutive odd numbers of series to be x, x + 2 and x + 4
So, the sum of consecutive even numbers = x + x + 2 + x + 4 = 69
3x + 6 = 69
3x = 69 – 6
3x = 63
x = 21
Therefore, Three consecutive odd numbers = x, x + 2 and x + 4
x + 2 = 21 + 2
= 23
x + 4 = 21 + 4
= 25
Prime number = 23.
APPEARS IN
RELATED QUESTIONS
The ages of Rahul and Haroon are in the ratio 5:7. Four years later the sum of their ages will be 56 years. What are their present ages?
Fifteen years from now Ravi’s age will be four times his present age. What is Ravi’s present age?
What should be added to twice the rational number `(-7)/3 "to get" 3/7`?
The present age of Sahil's mother is three times the present age of Sahil. After 5 years their ages will add to 66 years. Find their present ages.
The sum of three consecutive multiples of 7 is 357. Find the smallest multiple.
The sum of three consecutive even natural numbers is 48. Find the greatest of these numbers.
A man was engaged as typist for the month of February in 2009. He was paid Rs. 500 per day but Rs. 100 per day were deducted for the days he remained absent. He received Rs. 9,100 as salary for the month. For how many days did he work?
There are 40 passengers in a bus, some with Rs. 3 tickets and remaining with Rs. 10 tickets. The total collection from these passengers is Rs. 295. Find how many passengers have tickets worth Rs. 3?
A carpenter charged Rs. 2500 for making a bed. The cost of materials used is Rs. 1100 and the labour charges are Rs. 200/hr. For how many hours did the carpenter work?
