exam
Maths Puzzle
Numerical Ability
Tom can do a job in 3 hours, Dick in 4 hours, and Harry in 6 hours. If they do it together (and do not delay each other), how long does the job take?
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exam Other Question
Use a special product formula to factor the perfect square trinomial.
b2 + 18b + 81
find the next two tterms in each sequence
5, 10, 20, 40,__,__
o,t,t,f,f,s,s,e,__,__
j,f,m,a,m,__,__
1,2,6,24,120,__,__