John climbs up 3 flights of stairs. Each flight is 10 feet. He then climbs a rope that is half that height. Finally, he climbs a ladder that is 10 feet longer than the rope. How high up did he go?
Stream of thoughts:
70
He climbed 3 * 10 = 30 feet of stairs.

He then climbed 30 / 2 = 15 feet of rope.

Finally, he climbed a 15 + 10 = 25 foot ladder.

So in total, he climbed 30 + 15 + 25 = 70 feet.

.

The answer: 70