book Maths Puzzle Numerical Ability

John, twelve years old, is three times as old as his brother. How old will John be when he is twice as old as his brother?

Read Solution (Total 1)

3a=12 a=4 2a=2*4=8
8 years agoHelpfull: Yes(0) No(0)

book Other Question

How would you determine this problem? V= 4/3 * (pie) * r(cubed) with r as the independant variable. How would you find the x and y points to graph this equation? Sally wants to buy some things for her hair. She can buy 2 scrunchies & 4 barretts for $12.50 or 1 scrunchie & 6 Barretts for $12.25. How much does the scrunchie cost theat she wants to buy?
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