The remainder when (15²³ + 23²³⁾ is divided by 19, is  

If the profit on selling an article for Rs. 425 is the same as the loss on selling it for Rs. 355, then the cost price of the article is 

₹ 180 contained in a box consists of one rupee, 50 paise and 25 paise coins in the ratio 2 : 3 : 4 . What is the number of 50 paise coins?

The angles of elevation of top and bottom of flag kept on a flag post from 30 metres distance, are 45 ° and 30 ° respectively. Height of the flag is [ taking 13 = 1.732) 

The ratio of two numbers is 3:8 and their difference is 115. The smaller of the two numbers is:

What is the simple interest when Rs. 13000 get the interest Rs. 6,370 in the $$ {3{1\over 2}}$$ year?

A boat covers 35 km downstream in 2 h and covers the same distance upstream in 7 h. Find the speed (in km/h) of the boat in still water.  

If an item is sold for Rs. 270, there is a loss of 10 percent on it , then what will be the cost price of that item?