Question 2(c) :
Solve:
77−57
77−57=7−57=27
Question 177(i)
Find x. −(17)−5÷−(17)−7=(−7)x
Question 2(iv) Express the following in exponential form: (iv) 5×5×7×7×7
Question 7 Explain why 3×5×7+7 is a composite number.