Four boys and one girl go to a shopping mall for shopping. If each boy spends Rs.200 and the girl spends Rs.60 more than the average expenditure of all. Find the amount spent by the girl.
Average of radii of two circles is 28 cm. What will be the sum of their perimeters?
Find number of divisors of 8820
Find the number of zero in the end of 50! ?
The average age of 40 students of a class is 15 years 3 months. Due to admission of 5 new students average becomes 15 years. If the age of the younger one is 10 years, find the average of remaining four students.
Highest power of 4 which will divide 106!
On Sunday the average number of visitors to a library is 330, and on other days the average number of visitors is 120. Find the average number of visitors in a month of 30 days beginning with Saturday.
Find the number of co-primes of 36, less than 36
A mixture containing 5 litres of water and certain quantity of milk worth ₹ 30 per litre. If pure milk worths ₹ 40 per litre, how much milk is there in the mixture ?
Find the sum of all the factors of 90.
Three containers of equal volume contain alcohol mixed with water. The ratio of alcohol and water are 2 : 5, 3 : 7 and 4 : 5 respectively. All these mixtures are poured into a large container. Find ratio of alcohol and water in the large container.
In a class of 40 students, the average age of boys is 20 years and the average age of girls is 18 years. The fraction of girls out of the total students of the class is:
Two bottles contain spirit and water respectively in the ratio 2 : 5 and 2 : 3. Find the ratio in which they are to be mixed to get a new mixture in which the ratio of spirit to water is 1 : 2.
Ayush finds average of 20, 2 digits numbers. If the digits of one of the numbers is interchanged, average increases by 2.7. Find the difference between the digits of that 2 digits number.
The ratio of milk and water in a vessel containing 48 L mixture is 5 : 1. How much mixture should be replaced by water so that the ratio of milk and water becomes 5 : 3?
