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20
-958
16
-8 and -4
8x4=32 16x2=32 32x1=32
16, 32 and 48 have a GCF of 16. Whether you added or multiplied to get them doesn't make much difference.
Five twos.
-32
32 + 32
These are the pairs of numbers that when multiplied are equal to 64: (1, 64) (2, 32) (4, 16) (8, 8)
32 x 32 = 1024
How about: 32*5 = 160 as an example