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1. Four cards numbered 3,5,7 and 8. Use each card only once to solve the equation
...... ......+...... ...... =158
2. (Original post by Fernville)
Four cards numbered 3,5,7 and 8. Use each card only once to solve the equation
...... ......+...... ...... =158
What are your thoughts? What have you tried?
3. (Original post by Fernville)
Four cards numbered 3,5,7 and 8. Use each card only once to solve the equation
...... ......+...... ...... =158
So you've got two double digit numbers to add together to get a big three digit number. This should get you thinking that you want to make the two digit numbers as big as possible.

So you might think "oh, I'll do 87" but that's making only one number big and the other number is a bit small.

So perhaps you could use 8 and either 3 or 5 to make one number and then another 7 with 3 or 5 to make the next number. That'll get you ~80 + ~70 = ~150 which is what you want.

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