A takes 3 hours more than B to walk a distance of 30 km. When A doubles his speed, he can cover the same distance one and half hour quicker than B. What was A’s initial speed?

Anil has only 1- and 2-rupee coins. The total value of 2-rupee coins is 12 more than that of 1-rupee coin. The number of 1-rupee coins is 4 more than that of 2-rupee coins. What is the total amount that Anil has?

4 Friends, Sansa, Arya, Jon and Tyrion have 700 rupees collectively. Sansa has 70 rupees more than Arya. Jon has 50 rupees less than Arya. Tyrion has 80 rupees more than the money Arya and Jon have combined. They all have only 10- and 20-rupees notes. What is the least number of 10-rupee notes that they can have?

4 Friends, Sansa, Arya, Jon and Tyrion have 700 rupees collectively. Sansa have 70 rupees more than Arya. Jon has 50 rupees less than Arya. Tyrion has 80 rupees more than the money Arya and Jon have combined. They all have only 10- and 20-rupees notes. If the amount in 20-rupee notes is less than the amount in 10 rupees notes by 220, how many 20-rupee notes are there in total?

Marvel is celebrating the success of Endgame and decided to throw a party. All the persons involved in the making were invited. People came in car and bikes. In total, there were 100 vehicles in the parking. A guard counted that there were 280 wheels in total. How many bikes were there?

A flower shop was selling artificial and natural flowers. The shop has 4 varieties of each. All the 4 varieties of natural flower cost 250 collectively while the 4 types of artificial cost 70 collectively. The cheapest artificial flower costs 10 rupees. The combined price of 3 of the natural flowers is twice the cost of the rest of the artificial flower. What is the cost of the costliest natural flower? 

Gopal decided to give some money to Salman and Vivek. The amount given to both of them was such that if Salman gave 25 rupees to Vivek, they both will have the same amount. If Vivek gave 50 rupees to Salman, then Salman will have 4 times of what Vivek would have. How much money do they have in total?

In a university, $\frac{4}{5}$of the students are studying engineering and $\frac{1}{8}$th of them are mechanical engineers. If 350 students in the university are non-mechanical engineers, how many students are studying in the university?

A teacher went to buy some sharpeners and eraser for the students. The sharpeners cost 5 rupees each while the eraser cost 8 rupees each. He bought a bunch of them and paid 90 rupees. If he bought a total of 15 items, how many erasers did he buy? 

Three friends, Amar, Akbar and Anthony bought some stock market shares worth 64400 rupees. Each of them invested some amount. Anthony invested $\frac{2}{5}$ of what Amar and Akbar invested collectively. Amar invested $\frac{1}{2}$ of what Akbar and Anthony invested and 700 more to it. How much money did Anthony invested?

Ram and Shyam went to KFC. Ram ate 2 chicken wings, 5 zinger burgers and 9 puff corn. While Shyam ate 4 chicken wings, 10 zinger burgers and 13 puff corn. Shyam paid $\frac{2}{3}$ more than what Ram paid. What fraction of money did Ram pay for puff corn he ate?

The sum of the ages of Changu and Mangu is thrice of the sum of their ages 21 years before. If Mangu is $\frac{5}{4}$ times older than Changu, how old is Changu?