2, 4, 8, 16, ...? Jawab: 32
3, 6, 12, 24, ...? Jawab: 48
5, 10, 20, 40, ...? Jawab: 80
2. Perbandingan Bilangan
Jika 3 apel = 12 jeruk, berapa 5 apel = ... jeruk? Jawab: 20 jeruk
Perbandingan 7:14 = ...:? Jawab: 1:2
Rasio 9:27 = ...? Jawab: 1:3
3. Aritmatika Cepat
Hitung 25 16 = ... Jawab: 400
480 12 = ... Jawab: 40
125 + 376 -- 48 = ... Jawab: 453