Eighteen years ago, a man was three times as old as his son. Now, the man is twice as old as his son. The sum of the present ages of the man and his son is

The two numbers whose mean proportional is 14 and third proportional is 4802 are:

Find 2 numbers such that their mean proportional is 25 and their third proportional is 25.

Find the fourth proportion of the numbers $\frac{1}{3}rd of 15,\frac{4}{5}th of 25,\frac{3}{7}th of 35$

The fourth proportion of $\frac{1}{2},\frac{1}{3},and \frac{1}{4}$ is

The third proportional of a and $\frac{b^4}{4a}$ is

Find X, $\frac{1}{5}:\frac{3}{4}:\frac{2}{7}:X?$

615 coins consist of one rupee, 50 paise and 25 paise coins. Their values are in the ratio of 3 : 5 : 7, respectively. Find the number of 50 paise coins.

adj(A') =

ക്രമം 3 ആയ സിംഗുലാർ അല്ലാത്ത മാട്രിക്സ് ആണ് A എങ്കിൽ |adjA|=

The sum of five numbers is 655. The average of the first two numbers is 76 and the third number is 106. Find the average of the remaining two numbers?

If the radius of the base of a right circular cylinder is decreased by 27% and its height is increased by 237%, then what is the percentage increase (closest integer) in its volume?

If the radius of a cylinder is doubled and the height is halved, then the volume change will be

Evaluate: 2 × {17 - 2 × (10 -6)}

The average of first 120 odd natural numbers, is:

Evaluate: 2 × {17 - 2 × (9 -6)}

In a race, an athlete covers a distance of 312 m in 104 sec in the first lap. He covers the second lap of the same length in 52 sec. What is the average speed (in m/sec) of the athlete?

A cuboid has dimensions of length 10 cm, width 5 cm and height 8 cm. A cube with side length 5 cm is cut out from one of the faces of the cuboid. What is the remaining volume of the cuboid?

How many seconds will a boy take to run one complete round around a square field of side 55 metres, if he runs at a speed of 18 km/h?

A man riding on a bicycle at a speed of 93 km/h crosses a bridge in 36 minutes. Find the length of the bridge?

Safia calculated his loss percent as

14\frac27

% on cost price. The ratio of selling price to cost price will be:

Arun buys an old car for ₹4,75,000 and spends ₹80,000 on its repairs. If he sells the car for ₹5,85,000, find his gain percentage. (Rounded up to two decimal places)

In ∆LMN, medians MX and NY are perpendicular to each other and intersect at Z. If MX = 20 cm and NY = 30 cm, what is the area of ∆LMN (in cm² )?

Find the compound interest on ₹20,000 at 20% p.a for $1\frac12$ years compounded half-yearly.

The marked price of a book is 2,400. A bookseller gives a discount of 15% on it. What will be the cost price (in) of the book if he still earns a 20% profit?

The population of a town increases by 16% each year. If the population at the beginning of this year is 18,750, what will the population be at the end of next year?

The sum of 8 numbers is 684. Find their average.

The sum of five numbers is 655. The average of the first two numbers is 75 and the third number is 128. Find the average of the remaining two numbers?

Jitesh and Kamal can complete a certain piece of work in 18 and 17 days, respectively, They started to work together, and after 5 days, Kamal left. In how many days will Jitesh complete the remaining work?

A pipe can fill a tank in 6 hours, and another pipe can fill the same tank in 8 hours. If both pipes are opened at the same time, how long (in hours, rounded off to one decimal place) will it take to fill the tank?

A pipe can fill a tank in 9 hours. Another pipe can empty the filled tank in 27 hours. If both the pipes are opened simultaneously, then the time (in hours) in which the tank will be two-third filled, is:

Convert 0.363636 into a fraction.

A sum, when invested at 10% simple interest per annum, amounts to ₹4080 after 2 years. What is the simple interest (in ₹) on the same sum at the same rate of interest in 1 year?

The marked price of an item ₹ 25,000. Under a scheme, successive discounts of 10% and 8% are given on it. Find the total discount given while selling the item under the given scheme

If the least common multiple of 85 and 255 can be expressed as 85R+255, then the value of R is:

For what value of A, will the expression (13.56 × 13.56 + 13.56 × A + 0.04 × 0.04) be a perfect square?

The sum of five numbers is 655. The average of the first two numbers is 78 and the third number is 103. Find the average of the remaining two numbers?

How many seconds will a boy take to run one complete round around a square field of side 38 metres, if he runs at a speed of 6 km/h?

In a business with C, A and B invest ₹50,000 and ₹60,000, respectively. The profit of C is double the profit of B. If the total profit is ₹23,000, then the profit of A (in ₹) is:

Seven bells ring at intervals of 2, 3, 4, 6, 8, 9 and 12 minutes, respectively. They started ringing simultaneously at 7.10 in the morning. What will be the next time when they all ring simultaneously?

4 If 125 : y :: y : 180, find the positive value of y

The monthly incomes of two friends Vipul and Vijay, are in the ratio 5 : 7 respectively and each of them saves ₹81000 every month. If the ratio of their monthly expenditure is 2 : 4, find the monthly income of Vipul(in ₹).

A number when increased by 50 %', gives 2580. The number is:

Which of the following numbers is divisible by 11?

A² = I ആയ ഒരു സമചതുര മാട്രിക്സിനെ .................. എന്ന് പറയുന്നു .

A²=A ആയ ഒരു സമചതുര മാട്രിക്സിനെ .................. എന്ന് പറയുന്നു .

ശരിയായ ജോഡി തിരഞ്ഞെടുക്കുക.

സിംഗുലർ മാട്രിക്സ്	AB=I=BA
സിംഗുലാർ അല്ലാത്ത മാട്രിക്സ്	\|A\|≠0
പ്രതിലോമ്യ മാട്രിക്സ്	\|A\|=0
ലംബക മാട്രിക്സ്	AA'=I=A'A

If (x + 1) ∶ (x + 5) ∶∶ (x + 17) ∶ (x + 53) then what is the mean proportional between (x + 5) and (9x – 1) where x > 0?

What is the mean proportional between 3 and 27?

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