Number '256463127': even digits decreased by 2, odd digits increased by 2. How many digits remain unchanged after the transformation?

Correct answer: 0

Solution

Original: 2,5,6,4,6,3,1,2,7. Transforming: even digits(2,6,4,6,2)→0,4,2,4,0; odd digits(5,3,1,7)→7,5,3,9. New: 0,7,4,2,4,5,3,0,9. No original digit at any position matches the transformed digit. Count of unchanged = 0.

Related IBPS PO Quantitative Aptitude questions

Numbers: 842 639 285 721 945 842 639 285 721 945. What is the sum of: second digit of 3rd number from left + second digit of 2nd number from right?
Number '833594713': subtract 1 from all prime digits at odd-numbered positions. How many digits in the original number equal 4 after the transformation?
In '48927269485', how many pairs of consecutive digits have as many digits between them in the number as there are between them numerically?
Directions (51-55): There are five shops P, Q, R, S and T, and they sell two different items, A and B. The following pie chart shows the total number of items sold by different shops in a particular month. Total number of items sold = 500. What is the central angle corresponding to the total number of items sold by shop S?
In a bag, there are 3 magenta balls, 5 green balls, and 7 blue balls. Two balls are drawn one by one without replacement. If the first ball drawn is magenta, then 8 more magenta balls are added to the bag. Find the probability that both balls drawn are magenta.
A started a business. B and C joined him in the first year. Their investments were in the ratio 5:4:7 respectively, and the periods for which they invested were in the ratio 4:3:2 respectively. In the second year, A doubled the investment. B and C continued with the same investment for the same number of months as they did in the first year. The total profit in 2 years was Rs. 14,000. What is B's share of the profit?

⚔️ Practice IBPS PO Quantitative Aptitude free + battle 1v1 →