book Maths Puzzle Numerical Ability

i do'u under stand the greater than an less than thing and also the graph i do't know who i get it
please tell me

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book Other Question

You have $4.45 in nickels and dimes. There are 14 more nickels than dimes. how many of each do you have. ~K v ~ M / ~J v ~M

How do I tell if this is valid or invalid??