book
Maths Puzzle
Numerical Ability
SAL CAN DO A JOB IN 6 DAYS KATIE CAN DO IT 4 DAYS JON CAN DO THE JOB IN 2 DAYS HOW MANY DAYS WILL IT TAKE IF THEY COMPLETED THE JOB TOGETHER
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book Other Question
A couple has two children. At least one of them is male. What is the probability that one child is female, assuming the probability of having either sex is equal?
write answers in descending powers of x ADD
1.(xsquared+3x)+(4xsquared-2)