A six-digit integer X is formed by putting a 1 at the right-hand end of ABCDE.
Another six-digit integer Y is formed by putting a 1 at the left-hand end of ABCDE.
X is three times Y.
1ABCDE x 3 = ABCDE1
What is the five-digit integer ABCDE?
SOLUTIONS Fish tank (age 6 to 10) Mystery product (age 10 to 14) ABCDE is 42 857.