05MAY21WED

When a number is divided by 2, what are the possible remainders?

When a number is divided by 2, the possible remainders are 0 and 1.

When a number is divided by 3, what are the possible remainders?

When a number is divided by 3, the possible remainders are 0, 1 and 2.

When a number is divided by 4, what are the possible remainders?

When a number is divided by 4, the possible remainders are 0, 1, 2 and 3.

When a number is divided by 5, what are the possible remainders?

When a number is divided by 5, the possible remainders are 0, 1, 2, 3 and 4.


What is the sum of all the multiples of 5 below 100?

Multiples of 5
5 10 15 20 25 30 35 40 45 50
95 90 85 80 75 70 65 60 55

950

How do we know if a number is divisible by 5?

If a numbers ends in 0 or 5, it is divisible by 5.

If a numbers ends in 1 or 2 or 3 or 4 or 6 or 7 or 8 or 9, it is NOT divisible by 5.


What is the sum of all the multiples of 3 below 100?
3 6 9 12 … … … … … 93 96         99
1st 2nd 3rd 4th … … … … … 31st 32nd 33rd
16 pairs up to 32nd term, each 99, and 99 more
17 times 99

1683



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