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Type K
Posted: Sat Oct 20, 2007 11:23 am
by Guest
Can anyone help with these please....
8 (13) 11, 6(14)10, 3( ? )11
16(15)11, 17(13)14, 19( ? )18
and
30(20)10, 20(20)20, 40( ? )10
Posted: Sat Oct 20, 2007 1:06 pm
by patricia
Dear Guest
8 (13) 11, 6(14)10, 3( ? )11
11 – 8 = 3 + 10 = 13
10 – 6 = 4 + 10 = 14
11 – 3 = 8 + 10 = 18
16(15)11, 17(13)14, 19( ? )18
Same idea
16 – 11 = 5 + 10 = 15
17 – 14 = 3 + 10 = 13
19 – 18 = 1 + 10 = 11
and
30(20)10, 20(20)20, 40( ? )10
30 + 10 = 40 ÷ 2 = 20
20 + 20 = 40 ÷ 2 = 20
40 + 10 = 50 ÷ 2 = 25
Patricia
thank you
Posted: Sat Oct 20, 2007 5:05 pm
by Guest
Dear Patricia
you've made it so simple! Thank you!!!!