Question

1. Write divisibility rule of 3. If 506y5 is a multiple of 3, where y is a digit, what might be the values of y?

2. Take a 3 digit number 234. Reverse the order subtract smaller number from larger number divide the answer by 99. Find the remainder.

3. Plot the following points on a graph sheet.

K(3, 3), L(5, 3), M(6,3), N(2,3), O(5.5, 3), P(7,3)
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Answer 1

Answer:

A whole number is said to be divisible by 3 if the sum of all the digits of a whole number is exactly divided by 3; this rule is referred to as the divisibility rule of 3. Without doing division we can find out whether a number is divisible by 3 or not. For example, 45 is divisible by 3 as the sum of 45 is (4+5) = 9, is divided by 3. Hence, 45 is said to be divisible by 3, because it gives the quotient as 15 and the remainder as 0.