Question
Select the option that will replace the question mark
(?) in the following number series. 456, 444, 420, 384, 336, ?Solution
The correct answer is A
If (5x - 2y) = 170 and 4x:3y = 32:9, then find the value of (3x² + y²).
What is the HCF of (x³ + 3x² - x - 3) and (x³ + 4x² + x - 6)?

(44² × 16²) ÷ (184.8 ÷ 8.4) =? × 64
If, 3x + 2y = 15, and 2xy = 12, and 3x > 2y, then find the value of 27x³ – 8y³.
If a + b = 56 and (a – b)² = 496, find the value of the product of a and b.
The certain sum amounts to Rs11313.5 in 2(1/2) years at 12% p.a., interest compounded 10 months. The sum (in Rs) is:
  = ?Three mixtures: A, B, and C containing 25%, 35%, and X% of water, respectively. If all these mixtures are mixed in the ratio of 1:3:2 to form a resultan...
