Are You Dumb?

Are You Dumb?

this will determine how smart you are, and your ability to add, subtract, divide and multiply. ready?

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Are You Dumb?
what is 220+1?
题 1 out of 4
Are You Dumb?
2000x5
题 2 out of 4
Are You Dumb?
200 divided by 1
题 3 out of 4
Are You Dumb?
which on weighs more? a pound of steel or a pound of feathers?