Elliot had some red, blue and green pens for sale. There were 48 more blue pens than green pens. He had 10 more red pens than blue pens. After selling 3/4 of the blue pens and 1/2 of the green pens, there were 315 pens left.

(a)     How many green pens did Elliot have at first?

(b)     How many pens did Elliot have in total at first?

There are some red and green paper clips in a box. There are 48 more red than green paper clips. 50% of the red paper clips is equal to 3/4 of the green paper clips. How many paper clips are there in the box altogether?

A fruit seller sold some apples and oranges. He sold 3/7 of the apples in the morning and 3/8 of the remainder in the afternoon. He sold 1/3 of the oranges in the morning and 1/4 of the remainder in the afternoon. He had sole sold the same number of apples and oranges at the end of the day. If there were 8 more oranges than apples left unsold, how many fruits were there at first?

Adam and Justin had a total of 764 marbles. They used some of their marbles to make a marble track each and keep the remaining marbles. Adam had 1/3 as many marbles remaining as Justin after making their marble tracks. The number of marbles Justin used to make his marble track was 63 more more than what he had left. Justin used 3 times as many marbles is Justin to make his marble track. How many marbles did Adam have at first?