Given series is 372, 823, 644, 582, 46?, 8?7
Here the series follow the rule that :
372 = 3+7+2 = 12
823 = 8+2+3 = 13
644 = 6+4+4 = 14
582 = 5+8+2 = 15
46? = 4+6+? = 16 => ? = 6
8?7 = 8+?+7 = 17 => ? = 2
So the missing numbers are 6 and 2
F
Except option (c) rest all are perfect squares.
Except, `Plate', all two in number.
All other terms are used to denote the size.
15/20 x 5/4 x 2/3 x 8/5 = 1
All Except `Raft' are down by animal.
Only '729' is a perfect cube.
This is the only prime number in the group.
All others are soild metals.
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