Five pairs: which is bigger?
Five pairs a day. Tap the one that is bigger on the stated measure: more residents, a higher peak, a longer river. Both values show after your pick, so every pair teaches a number.
Two cards, one measure. Tap the one that is bigger on it.
20 seconds a pair. Right within 7 s: 20 · 14 s: 15 · 20 s: 10.
Right or not, you see both numbers. Five pairs a day, out of 100.