Math MCQ Part-9 

A man, a woman and a boy can complete a work in 3, 4 and 12 days, respectively. How many boys must assist one man and one woman to complete the same Work in one day ?

While selling 17 balls for Rs. 840, there is loss equal to the cost price of 5 balls. The cost price of one ball is

A person bought a book at 31% discount on its printed price. If no discount were given, then he would have to pay Rs. 2,480 more. How much did he pay (in Rs.) for the book ?

The ratio between the speeds of two trains is 2:5. If the first train covers 350 km in5 hours then the speed (in km/h) of the second train is :

If the ratio of principal and the simple interest for 5 years is 10:7, then the rate of interest (per annum) is:

If a :b = 2:3 and c: b = 5:6, then a:b:c is equal to:

What is the HCF of 23x 34 and 25x 32:

In what ratio must a shopkeeper mix two types of rice worth Rs 60 per kg and Rs 80 per kg, so that the average cost of the mixture is Rs 75 per kg ?

If the number 687x 29 is divisible by 9, then the value of 2x

Five years ag0, the average age of 4 girls was 7 years. When a new girl is included, their average present age becomes 13 years, The present age of new girl is