MATH LOGIC

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The 1st num is = 10
The 2nd num is = 20

Four basic operations:

Sum is = 30
Difference is = -10
Product is = 200
Quotient is = 0.5
Pi is = 3.143
Pi is = 3.143
Remainder of $num3 / $num4 is = 5
Power of 2 to 3 is = 8
Squareroot of 16 is = 4