Suppose that the division N ÷ 5 leaves a remainder of 4, and the division N ÷ 2 leaves a remainder of 1. What must be the units digit of N?
The unit digit of number of number is 9.
5 × 1 + 4 = 9. Also 2 × 4 + 1 = 9.
If the division N÷2 leaves no remainder, what might be the units digit of N?
If the division N÷2 leaves no remainder, what might be the units digit of N? [2 MARKS]
If the division N÷5 leaves a remainder of 0, what are the possible values of the unit’s digit of N? [2 MARKS]