#6 Long division for the win
#7 Product of primes
#9 Addition of two massive numbers
#10 Multiplying two triple digit numbers
#29 Product, prime and difference
#44 The lowest common multiple of 5 and 7
#47 The amount left in an account after paying money
#79 Lowest common multiple and prime factors
#82 Dividing zero, simplifying a fraction raised to a power and scientific notation
#105 Expressing 36 as a product of prime numbers
#106 Square root lying between two consecutive integers
#113 Prime numbers and lowest common multiples
#114 Find the highest common factor of 12 and 18
#203 Identifying an irrational number