allery994 × 1006 এর মান কত?
A999964
B999664
C999644
D996644
Answer & Solution
Correct answer: A. 999964
1. লক্ষ্য করুন 994 = 1000 − 6 এবং 1006 = 1000 + 6।
2. ব্যবহার করুন (a − b)(a + b) = a² − b², সুতরাং গুণফলটি 1000² −6²।
3. এটি দেয় 1,000,000 − 36 = 999,964।
_Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.1._
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