What did Einstein do in his spare time as a child?

How much is 40 dollars take away 25 percent? What was the probability that two heterozygous parents would have an offspring that produced rounds seeds? What is 3.14159265358979323846264338327950288 plus364178234678123649216349862139487612983746192836498217649872364987126934612938746921873649281364987216498763248762139847629183649218746981263481273649? Where does happiness come from according to the bible? What is twice the size of 1000? How many seconds in 7 months? How many feet are in 433 square feet? What is the link between the product of any four consecutive positive integers and some square numbers? What is the degree of one of the angles in a decagon? What is the acceleration of a car traveling from 0 to 60 miles in 4 seconds? Why do you move your decimal when multiplying? What is the purpose of using a circle graph? What is the value of 5m2 plus 4n2 if m equals 4 and n equals 3? What is 0.83x0.12? What function is used to complete the NISA form 9r? What is 2 over 3 divide by 2? What number multiply by 6 ends in 8? How do you write 1559461.625 in expanded form? Is the centroid of a triangle divides it by 2 1 ratio? How many flats does the C-flat major scale have?