The the missing term in the sequence 4, 8, 16, ___, 64 is 32
= (40 - 24) + 8
= 24
3 steps : 6 blocks = x steps : 15 blocks
3/6 = x/15
3×15 = 6×x
45 = 6x
x = 45/6
= 7.5
Approximately,
7 steps
x + y = 15
4x + 2y = 48
2x + 2y = 30
4x + 2y = 48
4x - 2x = 48 - 30
2x = 18
x = 18/2
x = 9
x + y = 15
9 + y = 15
y = 15 - 9
y = 6
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