What is the value of 994 × 1006?
A999964
B999664
C999644
D996644
Answer & Solution
Correct answer: A. 999964
1. Notice 994 = 1000 − 6 and 1006 = 1000 + 6.
2. Use (a − b)(a + b) = a² − b², so the product is 1000² − 6².
3. That gives 1,000,000 − 36 = 999,964.
_Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.1._
Related questions
Evaluate: (3 − 0.2) / (0.1 × (3 + 0.2)).If x = (√6 − 1)/(√6 + 1) and y = (√6 + 1)/(√6 − 1), find (3x² + 5xy + 3y²)/(3x² − 5xy + 3yEvaluate: 66 ÷ [67 − {43 − (17 − 117 ÷ 9 × 4)}] = ?Evaluate: −15 − (−18 − 35 ÷ 5) = ?What is the value of X if 7580 - X = 3440?Given that 551 / 29 = 19, what is the value of 5.51 / 0.0019?If 25 × 32 = 800, then 2.5 × 0.32 equals: