Others Maths Puzzle Numerical Ability

How many even numbers less than 1000 can be formed by using digits 2,4,3 and 5. If repetition of digits are allowed?

Read Solution (Total 1)

4*4*2=32 for 3 digit even numbers
4*2 = 8 for 2 digit even numbers
2 for unit digit even number
total = 32+8+2=42
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GIVE 1-9 NUMBERS TO THESE LETTERS SUCH THAT SUM IN ANY ROW OR COLUMN SHOULD BE EQUAL TO "13" AND NO NUMBER SHOULD BE REPEATED Sum of the digits of a three digit number is 17 and sum of the squares of the digit is 109. Also when the number is subtracted by 495 the number gets reversed. Find the number ?