HARD
10th ICSE
IMPORTANT
Earn 100

The sum S of n successive odd numbers starting from 3 is given by the relation : S = n(n + 2). Determine n, if the sum is 168.

Important Questions on Solving (Simple) Problems (Based On Quadratic Equations)

HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 2
A stone is thrown vertically downwards and the formula d=16t2+4t gives the distance, dmetres, that it falls in t seconds. How long does it take to fall 420 meters ?
HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 3
The product of the digits of a two digit number is 24. If its unit's digit exceeds twice its ten's digit by 2; find the number.
HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 4
The ages of two sisters are 11 years and 14 years. In how many years time will the product of their ages be 304 ?
HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 5
One year ago, a man was 8 times as old as his son. Now his age is equal to the square of his son's age. Find their present ages.
HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 6
The age of a father is twice the square of the age of his son. Eight years hence, the age of the father will be 4 years more than three times the age of the son. Find their present ages.
HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 7
The speed of a boat in still water is 15 km/hr. It can go 30 km upstream and return downstream to the original point in 4 hours 30 minutes. Find the speed of the stream.
HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 8
Mr. Mehra sends his servant to the market to buy oranges worth ₹15. The servant having eaten three oranges on the way, Mr. Mehra pays 25 paise per orange more than the market price. Taking x to be the number of oranges which Mr. Mehra receives, form a quadratic equation in x. Hence, find the value of x.
HARD
10th ICSE
IMPORTANT
Concise Mathematics>Chapter 6 - Solving (Simple) Problems (Based On Quadratic Equations)>EXERCISE>Q 9
₹250 is divided equally among a certain number of children. If there were 25 children more, each would have received 50 paise less. Find the number of children.