Mathematics
Seven times a two digit number is equal to four times the number obtained by reversing the order of digits. Find the number, if the difference between its digits is 3.
Related Questions
Solve :
217x + 131y = 913
131x + 217y = 827
Use method of cross-multiplication to solve :
(i) 2x + y = 8 and 3x - 2y = 5
(ii) x + 4y = 3 and 2x + 9y = 5
A and B each have a certain number of mangoes. A says to B, "If you give 30 of your mangoes, I will have twice as many as left with you". B replies, "If you give me 10, I will have thrice as many as left with you". How many mangoes does each have ?
A man rowing at the rate of 5 km an hour in still water takes thrice as much time in going 40 km up the river as in going 40 km down. Find the rate at which the river flows.