All the numbers ending with 0,2,4,6,8 are divisible by 2.
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1, 5, 11, 55, 121, 605
They are: 7 14 21 28 35 42 49 .... etc by adding 7 each time
Using the distributive property of multiplication over addition, 2*[2 - 2] = 2*[2 + (-2)] = 2*2 + 2*(-2)LHS = 2*0 = 0RHS = 4 + 2*(-2)Therefore 2*(-2) = -4 and, by commutativity, -2*2 = -4Next-2*[2 - 2] = -2*[2 + (-2)] = -2*2 + -2*(-2)LHS = -2*0 = 0RHS = -4 + -2*(-2)Therefore -2 times -2 = +4
Gcf 32=2*2*2*2*2 56=2*2*2*7 64=2*2*2*2*2*2 gcf=2*2*2 =8
256 = 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 = 2^8