105802. The radius of a sphere is increased by 50%. The percentage increase in surface area is

105803. The ratio between the ages of father and son is 5 : 2. If seven years ago the father was 43 years old, what is the present age of son?

105804. How many of the numbers between 200 and 500 begin or end with 3 ?

105805. One person sees his image in a mirror. If he walks backwards with a speed of 5 m./hour he sees his image moving with a speed of

105806. Fill in the missing number in the series 3, 6, 18, 9, 18, 54, 27, 54, 162

105807. Which is the only number other than 0 to 1 whose square root is equal to the sum of the digits ?

105808. What should be added to 5820 so that it is divisible by 18 ?

105809. Distance from a place A to another place B is 200 km. A car takes 3 hours to go from A to B and 4 hours to return from B to A. What is the average speed of the car in the whole journey?

105810. How much older is A than B ?

105811. How old is B?

105812. How old is A?

105813. 6 is the first perfect number. What is the next perfect number?

105814. A number when divided by 14 leaves a remainder 9. If the same number is divided by 7, what can be the remainder?

105815. How many factors are there for the resulting number 1 x 7 x 37 x 41?

105816. A ray of light falls on a plane mirror with an angle of incidence equal to 60. The angle of reflection is

105817. There are 50 children in a village out of 450 people,the part of adult is

105818. The sides of two squares are in the ratio 3:4.The ratio of their areas is

105819. 19,31,46,64 .............

105820. Diameter of a circle is

105821. 80x71= ............

105822. Find the value of (-1)49(1)100

105823. The decimal notation of

105824. Write the degree of the polynomial x2yz-3xy2-z2

105825. Write the smallest whole number

105826. The ratio of the number of male and female teachers in a school is found to be 2 : 3. If there are 20 male teachers, the number of female teachers are

105827. Coefficient of y in - 3xy + 5 is

105828. A man sold a horse for Rs. 360 losing 4 % of the cost price. How much does he pay for the horse?

105829. Area of a room is 400 sq. m. If the length of tile is 20 cms. and breadth is 10 cm., the number of tiles required is

105830. x2- 12x + 36 is equal to

105831. The supplement of right angle is always

105832. If Rs. 6,000 amounts to Rs. 7,200 in 4 years, then the rate of interest is

105833. 16 men can reap a field in 30 days. In how many days will 20 men reap the field?

105834. Two poles, 15 m. and 30m. high are 36m. apart. The distance between their tops is

105835. The average of three numbers is 15. If two numbers are 7 and 28 the third is

105836. The next number of the sequence 1, 4, 10, 19, 31, .........is

105837. A train moving with a uniform speed of 60 km./hr. crosses a pole in 6 seconds. The length of the train (in metres) is

105838. 3 of 1280 + ..........= 250% of 2000

105839. 7200 18 0.2 is equal to

105840. If n (A) = 20 n (B) = 8 n (A B) = 28, then n (A B) is

105841. (2 + 3) + 5 = 2 + (3 + 5) obey the law of

105842. Number of subsets of a set contains n elements is

105843. If A : B = 3 : 5 B : C = 4 : 7. Find A : B : C ?

105844. If 3p = 5q, then what is p : q ?

105845. If 21 cows eat equal to 15 oxen, how many cows will eat equal to 25 oxen?

105846. The length of a rectangle is 2 cms more than its width. If the perimeter is 36 cms., then the area is

105847. The exponent in (2ab) -2.6 is

105848. Find x, if 25 : x = x : 4

105849. Side of a square is 4x. Its area is

105850. A water tank contains 2/5 part water. When 250 litres of water is taken out, there remains 3/20 part of water in the tank. What is the volume of the tank?