general Maths Puzzle

A man has two bankcards, each with a 4 digit number. The first number is 4 times the second. The first number is the reverse of the second. Find the numbers.

Read Solution (Total 3)

first no 8712 second no 2178
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2178*4= 8712

so numbers are

2178 and 8712
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yes 2178 and 8712...
15 years agoHelpfull: Yes(0) No(1)

general Other Question

There is a ten-digit mystery number (no leading 0), represented by ABCDEFGHIJ, where each numeral, 0 through 9, is used exactly once. Given the following clues, what is the number?

1) B+C+F+J=E+G+H+I=AD,

2) B-H=J-G=3,

3) C-F=E-I=5,

4) B*I=AJ
How can you arrange 10 balls along five lines, each line containing exactly 4 balls?