Counting in 2s, 3s

Basic 1
Supply the missing numbers when counting in 2s 
1. 26, 28, 30, ______ ______
2. 54, 56, 58, ______ ______
3. 70, 72, 74, ______ ______
4. 13, 15, 17, ______ ______
5. 71, 73, 75, ______ ______

Supply the missing numbers when counting backward 2s 
6. 36, 34, 32, _____ ______
7. 28, 26, 24, _____ ______
8. 7, 5, 3, ______ ______
9.100, 98, 96, _______ _______
10. 81, 79, 77, _______ ______

Supply the missing numbers when counting in 3s
1. 30, 33, 36, _______
2. 54, 57, 60,  _______
3. 28, 31, 34, ________
4. 63, 66, 69, ________
5. 32, 35, 38, _________

Supply the missing numbers when counting backward in 3s
1. 12, 9, 6, ______
2. 48, 45, 42, ______
3. 33, 30, 27, ______
4. 28, 25, 22, ______
5. 99, 96, 93, _____