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How many four digit square numbers are composed of even numerals? What four digit square numbers can be reversed and become the square of another number?

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Triangular Triples

Show that 8778, 10296 and 13530 are three triangular numbers and that they form a Pythagorean triple.

Digat

Age 11 to 14 Challenge Level:

Look carefully at the sum below:

[3(230 + A)] 2 = 492 80A

What is the value of the digit A and HOW did you arrive at your answer?