If digits of each number are added and sum is multiplied by 2, and the resultants are arranged in descending order, which number will be at last position?

6523= 6 + 5 + 2 + 3 = 16 × 2= 32 8462 = 8 + 4 + 6 + 2 = 20 × 2= 40 2297 = 2 + 2 + 9 + 7 = 20 × 2= 40 5144 = 5 + 1 + 4 + 4 = 14 × 2= 28 4739= 4 + 7 + 3 + 9 = 23 × 2= 46 46 40 40 32 28 (Arranged in descending order).

If 50% of a certain number is equal to 3/5

^{th}of another number, what is the ratio between the numbers?What is the fourth proportional to 189, 273 and 153?

Rs.1581 is divided among A, B and C in the ratio 10 : 15 : 6. What is the share of B?

Find 'X' if the below three numbers are in proportion.

2.6, 1.3, X

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