Mensa stuff
Doubt I'll be able to do it every week, but haven't seen any in a while and just came across some good ones. Some of these might have been on here before 
1.Sally likes 225 but not 224; she likes 900 but not 800; she likes 144 but not 145. Does she like 1600 or 1700?
2.If you count from 1 to 100, how many 7"s will you pass on the way?
3.Consider this 4x4 grid of variables. At the ends of the columns and rows is the total sum of the variables in that column or row. Solve for a, b, c, d and X.
a a a a 28
a a b b 30
b c d a 20
d d c b 16
X 19 20 30
4.Two men, starting at the same point, walk in opposite directions for 4 meters, turn left and walk another 3 meters. What is the distance between them?
5.What is the following word when it is unscrambled?
H C P R A A T E U
6.Only one other English word can be made from the letters of the word INSATIABLE. What is it?
7.Four years ago, Jane was twice as old as Sam. Four years on from now, Sam will be 3/4 of Jane's age. How old is Jane now?
8.Continue the following number series with the group of numbers below which best continues the series?
1 10 3 9 5 8 7 7 9 6 ? ?
9.Which number comes next in this series of numbers?
2 3 5 7 11 13 17 ?
He generally is correct on solving all the puzzles. 