1. Stare the divisibitiry teests for 2,4 and 6 with an example for each.

To determine if a number is divisible by 2, simply check if its last digit is even—0, 2, 4, 6, or 8. For example, 84 ends in 4, so it is divisible by 2 (84 ÷ 2 = 42). For divisibility by 4, look at the last two digits of the number. If they form a number divisible by 4, the whole number is too. For instance, 312's last two digits form 12, which is divisible by 4 (312 ÷ 4 = 78). To check divisibility by 6, a number must be divisible by both 2 and 3. For example, 18 is divisible by 2 (last digit is 8) and by 3 (1+8=9, which is divisible by 3), so 18 is also divisible by 6 (18 ÷ 6 = 3).