Rithvik's Blog 11+

Amira has a jar of coins made up of only 10p and 20p coins. There are 24 coins in total. The total value of all the coins is £3.60. How many 10p coins does Amira have?

Sophie has a bag of marbles. She gives half of them to her friend Alex. Then, she gives a third of what she has left to Ben. After that, she gives a quarter of the remaining marbles to Clara. If she ends up with 18 marbles, how many marbles did Sophie have at the start?

A jar contains some red, blue, and green marbles. There are twice as many red marbles as blue marbles, and 6 fewer green marbles than red marbles. Altogether, there are 54 marbles in the jar. How many marbles of each colour are there?

I think of a number. I multiply it by 4, then subtract 6. The result is the same as if I had doubled the number and added 10. What was the number I originally thought of?

Sam had some marbles. He gave 1/3 of them to his friend Lucy. Then he lost 12 marbles on the way home. In the end, he had 16 marbles left. How many marbles did Sam have at the start?

Two numbers, A and B, satisfy the following conditions: The sum of A and B is 30. If you double A and subtract B, you get 10. What are the values of A and B?

A number is tripled and then 7 is added to the result. The final answer is the same as if the number were doubled and then 13 was added. What is the number?