Question
35% of 45% of 640 = z + 20.2, what is the sum of the
squares of the digits in ‘z’?Solution
ATQ,
35% of 45% of 640 = z + 20.2
Or, (7/20) × (9/20) × 640 = z + 20.2
Or, 100.8 = z + 20.2
Or, z = 80.6 → Take only digits: 8, 0, 6
Required sum = 8² + 0² + 6² = 64 + 0 + 36 = 100
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