9 ÷ [5 + 7 ÷ {9 + 9 ÷ (9 + 9 ÷ 4)}] = ?
Explanation:
Given: 9 ÷ [5 + 7 ÷ {9 + 9 ÷ (9 + 9 ÷ 4)}]
= 95+79+99+94
= 95+79+3645 = 95+79+45
= 95+3549 = 95+57
= 6340
Hence, option (b).
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