Answer: Option B
Explanation:
Let ten's digit be x and unit's digit be y.
Then, 10x + y = 3 (x + y)
⇒ 7x 2y = 0 -------- (i)
⇒ 10x + y + 45 = 10y + x
⇒ y x = 5 ------------- (ii)
Solving (i) and (ii), we get : x = 2 and y = 7.
∴ Required number = 27
Let the two fraction be a and b. Then, ab = 14/15 and a/b = 35/24. ab/(a/b) = (14/15 x 24/35 ) <=> b2 = 16/25 <=> b = 4/5.
ab = 14/15
⇒ a = (14/15 x 5/4) = 7/6
Since, a > b , so greater fraction is 7/6.
Answer: Option C
A = 2B B = A/2.
So, AB = 2/25 ⇒ A2 = 2/25
⇒ A2 = 4/25
⇒ A = 2/5.
Answer: Option A
Let the numerator be x. Then, denominator = x + 3.
Now, x + 4 = 4/5
(x + 3) + 4
⇒ 5(x + 4) = 4 (x + 7)
∴ The fraction is 8/11.
