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SSC Selection Post 2020 PYQ — Question 63

SSC Selection Post - Graduation Level 2020 - 14 Dec 2020 - Shift 3 • Quantitative Aptitude • Q63

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The average of four consecutive even numbers a, b, c and d is 33. Find the product of b and d.

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Correct answer: C

Explanation

The correct answer is Option 3 i.e. 1152.

Let the numbers be: a = x, b = x + 2, c = x + 4, d = x + 6

Average = x+x+2+x+4+x+64x+x+2+x+4+x+6\over4

⇒ 33 = 4x+1244x+12\over4

⇒ x = 30

⇒ b × d = (x + 2)(x + 6) 

⇒ 32 × 36 = 1152