Using divisibility tests, determine which of the following numbers are

1.	Using divisibility tests, determine which of the following numbers are divisible by 4?(a) 4096(b) 21084(c) 31795012
Answer» (a) We have, 4096 Since, the last two digits 96 is divisible by 4. ∴ 4096 must be divisible by 4. (b) We have, 21084 Since, the last two digits 84 is divisible by 4. ∴ 21084 must be divisible by 4. (c) We have, 31795012 Since, the last two digits 12 is divisible by 4. ∴ 31795012 must be divisible by 4.

Using divisibility tests, determine which of the following numbers are divisible by 4?(a) 4096(b) 21084(c) 31795012

Answer»

(a) We have, 4096

Since, the last two digits 96 is divisible by 4.

∴ 4096 must be divisible by 4.

(b) We have, 21084

Since, the last two digits 84 is divisible by 4.

∴ 21084 must be divisible by 4.

(c) We have, 31795012

Since, the last two digits 12 is divisible by 4.

∴ 31795012 must be divisible by 4.