Question

If two is subtracted from each odd digit and three is added to each even digit in the number 3675249. How many digits will appear twice in the new number thus formed?

Options

• 1

• 2

• 3

• 4

Answer 1

2
Explanation:
Subtract 2 from odd digits in a given number and add 3 in even digits
3    6   7   5   2   4   9
↓         ↓    ↓             ↓
-2      -2   -2            -2
__________________________
1   6   5    3   2   4    7
     ↓              ↓    ↓ 
   +3            +3  +3
___________________________
1   9   5    3   5   7    7

So, answer will be 2 because in the new number there are two five and two seven.